Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 861 · 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. 1.320 decreased by 5% =
2. 2.480 increased by 5% =
3. 3.80 decreased by 15% =
4. 4.530 decreased by 60% =
5. 5.620 decreased by 10% =
6. 6.400 decreased by 10% =
7. 7.700 increased by 35% =
8. 8.240 decreased by 10% =
9. 9.660 increased by 35% =
10. 10.330 decreased by 30% =
11. 11.292 decreased by 25% =
12. 12.50 increased by 8% =
13. 13.600 increased by 35% =
14. 14.520 increased by 30% =
15. 15.220 decreased by 10% =
16. 16.175 increased by 8% =
17. 17.160 increased by 60% =
18. 18.245 decreased by 40% =
19. 19.45 increased by 20% =
20. 20.440 increased by 35% =
21. 21.470 decreased by 40% =
22. 22.320 decreased by 60% =
23. 23.480 decreased by 5% =
24. 24.460 decreased by 40% =
25. 25.256 increased by 25% =
26. 26.320 decreased by 5% =
27. 27.210 decreased by 50% =
28. 28.715 decreased by 40% =
29. 29.430 increased by 50% =
30. 30.290 increased by 10% =
31. 31.525 decreased by 60% =
32. 32.280 increased by 75% =
33. 33.200 increased by 40% =
34. 34.520 increased by 5% =
35. 35.540 increased by 75% =
36. 36.280 decreased by 75% =
37. 37.200 decreased by 8% =
38. 38.768 decreased by 25% =
39. 39.650 increased by 30% =
40. 40.275 increased by 40% =

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