Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 137 · 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. 1.300 increased by 8% =
2. 2.110 decreased by 40% =
3. 3.740 increased by 35% =
4. 4.420 increased by 5% =
5. 5.240 increased by 30% =
6. 6.700 decreased by 12% =
7. 7.680 increased by 35% =
8. 8.215 increased by 60% =
9. 9.608 increased by 75% =
10. 10.240 increased by 10% =
11. 11.140 increased by 35% =
12. 12.50 increased by 20% =
13. 13.90 decreased by 40% =
14. 14.252 increased by 75% =
15. 15.150 increased by 12% =
16. 16.500 decreased by 5% =
17. 17.200 increased by 12% =
18. 18.400 increased by 40% =
19. 19.160 decreased by 20% =
20. 20.500 decreased by 15% =
21. 21.375 increased by 20% =
22. 22.740 increased by 60% =
23. 23.200 decreased by 12% =
24. 24.200 increased by 8% =
25. 25.250 decreased by 10% =
26. 26.385 increased by 20% =
27. 27.650 increased by 30% =
28. 28.120 increased by 40% =
29. 29.264 decreased by 75% =
30. 30.644 increased by 50% =
31. 31.704 increased by 50% =
32. 32.470 decreased by 20% =
33. 33.696 increased by 75% =
34. 34.530 increased by 30% =
35. 35.145 increased by 40% =
36. 36.760 decreased by 10% =
37. 37.412 increased by 50% =
38. 38.695 decreased by 60% =
39. 39.782 decreased by 50% =
40. 40.424 increased by 75% =

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