Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 130 · 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. 1.620 increased by 35% =
2. 2.270 increased by 60% =
3. 3.240 decreased by 25% =
4. 4.50 increased by 8% =
5. 5.375 decreased by 8% =
6. 6.320 increased by 15% =
7. 7.560 increased by 30% =
8. 8.230 increased by 30% =
9. 9.280 decreased by 40% =
10. 10.80 decreased by 20% =
11. 11.725 increased by 20% =
12. 12.40 decreased by 35% =
13. 13.590 decreased by 10% =
14. 14.765 increased by 20% =
15. 15.385 increased by 40% =
16. 16.96 increased by 50% =
17. 17.90 increased by 10% =
18. 18.660 increased by 35% =
19. 19.465 increased by 60% =
20. 20.236 decreased by 75% =
21. 21.205 decreased by 20% =
22. 22.730 increased by 30% =
23. 23.260 increased by 15% =
24. 24.696 increased by 75% =
25. 25.250 decreased by 8% =
26. 26.192 increased by 50% =
27. 27.144 decreased by 75% =
28. 28.780 decreased by 60% =
29. 29.435 increased by 20% =
30. 30.660 increased by 35% =
31. 31.290 increased by 10% =
32. 32.612 decreased by 25% =
33. 33.740 increased by 10% =
34. 34.425 increased by 20% =
35. 35.630 decreased by 10% =
36. 36.580 decreased by 30% =
37. 37.100 decreased by 12% =
38. 38.435 increased by 60% =
39. 39.240 increased by 25% =
40. 40.585 decreased by 40% =

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