Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 97 · 40 questions

The fast method (One-step multiplier): Increase by p%: multiply by (100 + p)% — up 20% is × 1.2. Decrease by p%: multiply by (100 − p)% — down 25% is × 0.75. Easy way to multiply: × the whole number (115 or 75), then ÷ 100.

1. 1.600 increased by 12% =
2. 2.104 increased by 50% =
3. 3.300 increased by 15% =
4. 4.460 decreased by 5% =
5. 5.250 increased by 30% =
6. 6.475 increased by 8% =
7. 7.224 increased by 50% =
8. 8.670 decreased by 50% =
9. 9.475 increased by 12% =
10. 10.508 decreased by 25% =
11. 11.405 increased by 40% =
12. 12.520 increased by 35% =
13. 13.112 increased by 50% =
14. 14.260 decreased by 15% =
15. 15.740 increased by 5% =
16. 16.375 increased by 40% =
17. 17.488 increased by 50% =
18. 18.200 decreased by 10% =
19. 19.548 decreased by 50% =
20. 20.195 increased by 20% =
21. 21.735 decreased by 60% =
22. 22.456 increased by 25% =
23. 23.310 decreased by 50% =
24. 24.540 increased by 35% =
25. 25.160 decreased by 15% =
26. 26.736 decreased by 25% =
27. 27.280 increased by 15% =
28. 28.755 decreased by 20% =
29. 29.450 decreased by 60% =
30. 30.560 increased by 30% =
31. 31.240 increased by 30% =
32. 32.630 decreased by 10% =
33. 33.740 increased by 5% =
34. 34.475 increased by 8% =
35. 35.500 increased by 20% =
36. 36.480 decreased by 40% =
37. 37.140 decreased by 50% =
38. 38.480 decreased by 15% =
39. 39.145 decreased by 20% =
40. 40.564 decreased by 75% =

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