How much did your robot's stats really shift from Season 1 to Season 2? And does a bigger change mean better results?
50 Minutes
1
What Is It?
Visual intro
→
2
The Formula
Tap to learn
→
3
Example
Step by step
→
4
Your Stats
Calculator
→
5
Proportional?
The big question
What is Percent Change?
A number that shows how much something grew or shrank — and by how much.
Tap a scenario to see percent change
4
Season 1
+50%
6
Season 2
+%
Went Up
Stat increased from S1 to S2
−%
Went Down
Stat decreased from S1 to S2
0%
No Change
Stat stayed the same
Why it matters
You just spent tokens in the auction to upgrade your robot. Percent change tells you exactly how big that upgrade really was — and whether it will actually change your results this afternoon.
The Formula
Tap each colored piece to find out what it means.
% Change
=
(S2 Value
−
S1 Value)
S1 Value
×
100
Tap any colored part of the formula to see what it does.
+
Result is positive → stat went UP
−
Result is negative → stat went DOWN
0
Result is zero → stat didn't change
Watch out: Always divide by the Season 1 value — not Season 2. The starting value is the reference point.
Special cases
Season 1 value is zero? Write "N/A." You can't divide by zero. That's a mathematical rule, not a mistake.
Same values both seasons? Write "0%." Zero percent change is a correct, complete answer — it just means that stat didn't move.
Worked Example
Speed goes from 4 to 6. Follow each step.
Season 1 Speed
4
CHANGED
Season 2 Speed
6
1
Find your two numbers
Season 1 value and Season 2 value
S2 = 6 · S1 = 4
These are the numbers from your team's stat sheet. Season 2 is what you have now after the auction.
2
Subtract
S2 minus S1
6 − 4 = 2
This tells you how much the stat moved. Positive = it went up. Negative = it went down.
3
Divide by Season 1
The change ÷ the original
2 ÷ 4 = 0.5
Always divide by the Season 1 value. That is the denominator — the starting point.
4
Multiply by 100
Turn the decimal into a percentage
0.5 × 100 = 50
Multiplying by 100 converts the decimal into a percentage. 0.5 = 50%. Always the last step.
Speed Change: Season 1 → Season 2
+50%
Speed increased by 50%
Full equation
(6 − 4) ÷ 4 × 100 = 50%
Your Stat Calculator
Enter your Season 1 and Season 2 values. The percent change calculates automatically.
Find your Season 1 values on the class reference board. Your Season 2 values are on your team's stat sheet from the auction.
Record on the paper worksheet
As you enter your values below, also fill in the Percent Change Worksheet your teacher handed out.
For each stat, write your Season 1 and Season 2 values into the formula and show your calculation step by step.
You'll hand the worksheet in at the end of class.
Speed
motorPower% = (S × 100) ÷ 20
—
S1S2
Endurance
P(t) = 100 − (20−E)×1.5×t
—
S1S2
Turning
turnRatio = 0.2 + (T × 0.02)
—
S1S2
Power
charge = P²
—
S1S2
Summary
StatS1S2% Change
Speed——
—
Endurance——
—
Turning——
—
Power——
—
Biggest Change
Is Percent Change Proportional?
If a stat goes up 50%, do your results go up 50% too? It depends on the formula.
If Speed goes up 50%... do wins go up 50%?
The answer depends on which stat changed and how the formula works.
✓ Proportional
Speed
4
→
6
(+50%)
Motor power S120%
Motor power S230%
Output also up +50%
The formula is linear. Double the stat, double the output. That's proportional.
✗ NOT Proportional
Power
4
→
6
(+50%)
Charge S1 (4²)16
Charge S2 (6²)36
Output up +125% — not 50%!
The formula is quadratic (P²). Small stat change = big output jump. That's NOT proportional.
Try it yourself
How to use this
Pick a stat from the tabs below.
Drag the slider to change its value. The baseline is always 8.
Left box = the formula output (motor power, charge, etc.). Watch how much this actually moves.
Right box = the percent change in the stat value itself.
Read the verdict below the boxes — it tells you whether the output scaled at the same rate as the stat, or differently.
8
Motor Power
40.0%
Stat % Change from S1 = 8
0%
No change
3 Questions to answer at your table
1
Which stat did your team change the most? What was the percent change?
2
Does that stat directly affect how many wins you get? Look at the formula.
3
Based on your percent change — should your win prediction go up, stay the same, or go down? Why?
Match Day 2 is the test
This afternoon's matches will show whether your percent change produced a proportional result. Keep your worksheet — you'll compare it to real results on Friday.