Step 1
Drag to add
The tower grew! Drag blocks to show the amount of change.
Original ({{data.s1_original}})
New ({{data.s1_new}})
Drop here
Change Blocks
Drag to fill the gap
The change is {{data.s1_change}}!
Step 2
Tap to build
Build the formula for Percent Increase using the tower numbers.
% Inc =
× 100
{{ s2.num ? s2.num.val : '?' }}
{{ s2.den ? s2.den.val : '?' }}
= {{ Math.round((data.s1_change / data.s1_original) * 100) }}%
Step 3
Slide to discount
Adjust the slider to make the price exactly {{data.s3_target_pct}}% off.
Sale
${{ s3.currentVal }}
Original: ${{ data.s3_original }}
Target: {{data.s3_target_pct}}% off
Current Discount
{{ s3.currentPct }}%
$1
${{data.s3_original - 1}}
Step 4
Adjust to solve
Calculate the Percent Error.
Estimate
{{data.s4_estimate}}
ACTUAL
Target
{{data.s4_actual}}
Error Amount =
|
{{data.s4_estimate}}
-
{{data.s4_actual}}
|
=
{{ Math.abs(data.s4_estimate - data.s4_actual) }}
{{ Math.abs(data.s4_estimate - data.s4_actual) }}
{{ data.s4_actual }}
=
{{s4.currentVal}}%
Perfect!
🏆
Percent Master!
You've successfully calculated percent change, decrease, and error!