Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown.
Level 1 · Warm-up
1 Bought for $25, sold for $35. Profit?
Show worked solution
35 − 25 = $10.
2 Same sale: profit percentage?
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10/25 × 100 = 40%.
3 A $90 shirt at 20% off costs…?
Show worked solution
90 × 0.8 = $72.
Level 2 · Core
4 Cost $120, markup 75%. Selling price?
Show worked solution
120 × 1.75 = $210.
5 Simple interest: $4000 at 5% p.a. for 3 years?
Show worked solution
4000 × 0.05 × 3 = $600.
6 Bought at $80, sold at $68. Loss percentage?
Show worked solution
Loss $12 on cost $80: 12/80 = 15%.
Level 3 · Challenge
7 A TV: ticket $800, 25% off, then a further 10% off. Final price?
Show worked solution
800 × 0.75 × 0.9 = $540 (32.5% off in total).
8 $2500 earned $300 simple interest in 2 years. Rate p.a.?
Show worked solution
$150/year → 150/2500 = 6% p.a.
9 A bike sells for $276 after a 20% markup. What did the shop pay?
Show worked solution
276 is 120% of cost: ÷1.2 = $230.