Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 419 · 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. 1.520 decreased by 35% =
2. 2.84 increased by 75% =
3. 3.595 increased by 20% =
4. 4.380 decreased by 5% =
5. 5.284 decreased by 25% =
6. 6.550 increased by 12% =
7. 7.144 increased by 75% =
8. 8.184 increased by 75% =
9. 9.124 decreased by 25% =
10. 10.152 increased by 25% =
11. 11.500 increased by 15% =
12. 12.250 decreased by 12% =
13. 13.245 increased by 40% =
14. 14.240 decreased by 35% =
15. 15.370 increased by 20% =
16. 16.75 increased by 60% =
17. 17.630 decreased by 20% =
18. 18.50 increased by 20% =
19. 19.560 decreased by 15% =
20. 20.460 increased by 15% =
21. 21.40 increased by 30% =
22. 22.700 increased by 5% =
23. 23.555 decreased by 60% =
24. 24.310 decreased by 40% =
25. 25.100 decreased by 35% =
26. 26.80 increased by 60% =
27. 27.480 decreased by 35% =
28. 28.85 increased by 20% =
29. 29.452 increased by 25% =
30. 30.220 decreased by 5% =
31. 31.70 increased by 60% =
32. 32.100 increased by 5% =
33. 33.780 increased by 15% =
34. 34.240 decreased by 5% =
35. 35.252 decreased by 50% =
36. 36.520 decreased by 15% =
37. 37.85 increased by 40% =
38. 38.790 decreased by 30% =
39. 39.550 decreased by 30% =
40. 40.136 decreased by 75% =

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