Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 439 · 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. 1.192 increased by 25% =
2. 2.570 increased by 10% =
3. 3.40 increased by 20% =
4. 4.562 increased by 50% =
5. 5.740 increased by 20% =
6. 6.325 increased by 8% =
7. 7.370 increased by 10% =
8. 8.280 increased by 35% =
9. 9.480 decreased by 25% =
10. 10.380 decreased by 10% =
11. 11.112 increased by 75% =
12. 12.80 increased by 15% =
13. 13.225 increased by 8% =
14. 14.200 increased by 60% =
15. 15.225 decreased by 8% =
16. 16.100 decreased by 15% =
17. 17.560 decreased by 15% =
18. 18.140 increased by 5% =
19. 19.260 increased by 75% =
20. 20.460 decreased by 35% =
21. 21.530 decreased by 10% =
22. 22.225 increased by 8% =
23. 23.765 increased by 60% =
24. 24.540 decreased by 15% =
25. 25.300 decreased by 5% =
26. 26.400 decreased by 15% =
27. 27.160 increased by 35% =
28. 28.720 decreased by 15% =
29. 29.730 decreased by 10% =
30. 30.424 increased by 50% =
31. 31.360 increased by 15% =
32. 32.250 decreased by 12% =
33. 33.720 decreased by 5% =
34. 34.320 increased by 15% =
35. 35.680 decreased by 20% =
36. 36.315 decreased by 40% =
37. 37.765 decreased by 20% =
38. 38.575 decreased by 8% =
39. 39.785 increased by 40% =
40. 40.700 decreased by 60% =

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