QR 101 · Course unit
Percentages: repair a budget decision
Compare discounted cost and simple interest.
Practice in MathBeasts (opens the existing external demo in a new tab)
Opens the existing MathBeasts demo in a new tab. Launched separately — activity there is not synced back and never affects sample progress or grades here.
- 01 Course challenge
- 02 Diagnostic
- 03 Targeted repair
- 04 Mastery & return
Percentages repair bench
Convert a percentage to a decimal by dividing by 100, then multiply by the base amount.
Worked example
15% of $80 = 0.15 × 80 = $12. After a 15% discount: $80 − $12 = $68.
Two correct guided practice answers unlock two new transfer checks.
Unit prerequisite tools
Percentages
required
Not tested yet
Order of operations
diagnostic-recommended
Not tested yet
Fractions
on-demand
Available whenever needed