mathgripe

sale price practice calculator

--% of $--

about this game

this game is a work in progress. it runs entirely in your browser, so you don't need to install anything.

how to play

the goal is to calculate the discount amount in your head. pick the correct dollar amount from the two options provided.

the easy trick:

examples:

example 1: 20% of $50 CAD

10% of $50 is $5. Since you need 20%, multiply $5 by 2, which gives you $10.

example 2: 30% of $40 CAD

10% of $40 is $4. Since you need 30%, multiply $4 by 3, which gives you $12.