Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 533 · 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. 1.140 decreased by 5% =
2. 2.102 increased by 50% =
3. 3.300 increased by 10% =
4. 4.760 increased by 10% =
5. 5.64 decreased by 25% =
6. 6.785 decreased by 20% =
7. 7.550 increased by 12% =
8. 8.582 increased by 50% =
9. 9.160 increased by 15% =
10. 10.220 decreased by 20% =
11. 11.376 increased by 25% =
12. 12.435 increased by 20% =
13. 13.80 decreased by 5% =
14. 14.80 increased by 20% =
15. 15.420 increased by 75% =
16. 16.208 decreased by 25% =
17. 17.710 increased by 40% =
18. 18.720 decreased by 5% =
19. 19.400 decreased by 75% =
20. 20.100 increased by 35% =
21. 21.374 decreased by 50% =
22. 22.500 increased by 5% =
23. 23.130 decreased by 60% =
24. 24.300 decreased by 5% =
25. 25.44 increased by 25% =
26. 26.470 increased by 30% =
27. 27.300 increased by 5% =
28. 28.625 decreased by 12% =
29. 29.70 increased by 30% =
30. 30.320 increased by 5% =
31. 31.450 decreased by 10% =
32. 32.75 decreased by 12% =
33. 33.40 increased by 25% =
34. 34.180 increased by 35% =
35. 35.520 decreased by 5% =
36. 36.400 increased by 15% =
37. 37.485 decreased by 20% =
38. 38.800 increased by 35% =
39. 39.40 decreased by 15% =
40. 40.610 increased by 10% =

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