Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 93 · 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. 1.700 increased by 15% =
2. 2.710 increased by 10% =
3. 3.340 increased by 10% =
4. 4.150 decreased by 8% =
5. 5.800 decreased by 75% =
6. 6.740 decreased by 5% =
7. 7.260 increased by 35% =
8. 8.640 increased by 10% =
9. 9.350 decreased by 40% =
10. 10.790 decreased by 50% =
11. 11.560 increased by 15% =
12. 12.555 increased by 20% =
13. 13.255 decreased by 60% =
14. 14.75 increased by 12% =
15. 15.365 decreased by 20% =
16. 16.620 decreased by 15% =
17. 17.220 increased by 60% =
18. 18.104 increased by 50% =
19. 19.58 decreased by 50% =
20. 20.200 increased by 30% =
21. 21.280 increased by 60% =
22. 22.495 decreased by 60% =
23. 23.48 increased by 25% =
24. 24.620 increased by 15% =
25. 25.560 increased by 50% =
26. 26.640 decreased by 5% =
27. 27.504 decreased by 25% =
28. 28.750 decreased by 30% =
29. 29.300 increased by 10% =
30. 30.92 increased by 75% =
31. 31.560 increased by 15% =
32. 32.480 increased by 30% =
33. 33.300 increased by 30% =
34. 34.192 increased by 75% =
35. 35.230 increased by 60% =
36. 36.116 decreased by 25% =
37. 37.460 decreased by 15% =
38. 38.660 increased by 15% =
39. 39.755 decreased by 20% =
40. 40.240 increased by 60% =

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