Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 271 · 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. 1.145 increased by 60% =
2. 2.660 increased by 5% =
3. 3.244 decreased by 75% =
4. 4.750 decreased by 8% =
5. 5.608 decreased by 75% =
6. 6.480 increased by 30% =
7. 7.290 decreased by 30% =
8. 8.140 increased by 15% =
9. 9.560 increased by 5% =
10. 10.50 decreased by 30% =
11. 11.720 decreased by 5% =
12. 12.500 increased by 35% =
13. 13.560 increased by 15% =
14. 14.305 decreased by 60% =
15. 15.180 increased by 35% =
16. 16.250 increased by 60% =
17. 17.675 increased by 12% =
18. 18.312 decreased by 75% =
19. 19.210 decreased by 30% =
20. 20.692 decreased by 25% =
21. 21.640 increased by 60% =
22. 22.360 decreased by 10% =
23. 23.452 decreased by 25% =
24. 24.280 decreased by 30% =
25. 25.160 decreased by 5% =
26. 26.472 decreased by 25% =
27. 27.220 decreased by 15% =
28. 28.424 increased by 75% =
29. 29.175 increased by 12% =
30. 30.454 decreased by 50% =
31. 31.480 decreased by 35% =
32. 32.715 decreased by 40% =
33. 33.100 decreased by 8% =
34. 34.675 decreased by 8% =
35. 35.460 increased by 10% =
36. 36.640 increased by 25% =
37. 37.620 increased by 35% =
38. 38.240 decreased by 20% =
39. 39.580 increased by 15% =
40. 40.470 increased by 10% =

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