Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 295 · 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. 1.505 increased by 60% =
2. 2.40 increased by 5% =
3. 3.480 increased by 35% =
4. 4.200 increased by 8% =
5. 5.610 decreased by 30% =
6. 6.470 increased by 60% =
7. 7.50 increased by 30% =
8. 8.700 increased by 40% =
9. 9.755 increased by 40% =
10. 10.160 increased by 35% =
11. 11.315 increased by 60% =
12. 12.745 increased by 20% =
13. 13.160 decreased by 35% =
14. 14.400 decreased by 15% =
15. 15.430 increased by 30% =
16. 16.112 decreased by 25% =
17. 17.640 increased by 10% =
18. 18.175 increased by 40% =
19. 19.620 decreased by 5% =
20. 20.50 decreased by 8% =
21. 21.440 decreased by 35% =
22. 22.538 increased by 50% =
23. 23.110 decreased by 60% =
24. 24.560 decreased by 10% =
25. 25.480 increased by 10% =
26. 26.412 decreased by 50% =
27. 27.180 increased by 15% =
28. 28.280 decreased by 15% =
29. 29.260 decreased by 40% =
30. 30.150 increased by 12% =
31. 31.96 decreased by 75% =
32. 32.452 decreased by 25% =
33. 33.665 increased by 60% =
34. 34.400 decreased by 12% =
35. 35.684 decreased by 75% =
36. 36.420 increased by 25% =
37. 37.580 increased by 30% =
38. 38.560 increased by 15% =
39. 39.175 increased by 40% =
40. 40.796 increased by 75% =

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