Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 854 · 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. 1.595 decreased by 60% =
2. 2.40 increased by 75% =
3. 3.400 decreased by 15% =
4. 4.164 decreased by 25% =
5. 5.176 increased by 75% =
6. 6.740 decreased by 5% =
7. 7.630 decreased by 60% =
8. 8.324 decreased by 50% =
9. 9.660 decreased by 15% =
10. 10.225 increased by 8% =
11. 11.320 increased by 15% =
12. 12.260 increased by 5% =
13. 13.300 increased by 8% =
14. 14.100 increased by 30% =
15. 15.604 increased by 75% =
16. 16.180 decreased by 35% =
17. 17.240 decreased by 60% =
18. 18.760 decreased by 30% =
19. 19.160 decreased by 75% =
20. 20.620 decreased by 75% =
21. 21.220 increased by 15% =
22. 22.445 decreased by 60% =
23. 23.125 decreased by 8% =
24. 24.200 decreased by 30% =
25. 25.145 increased by 40% =
26. 26.740 increased by 25% =
27. 27.700 decreased by 5% =
28. 28.140 increased by 15% =
29. 29.310 increased by 30% =
30. 30.420 increased by 40% =
31. 31.450 decreased by 30% =
32. 32.375 increased by 12% =
33. 33.500 increased by 10% =
34. 34.240 increased by 20% =
35. 35.540 decreased by 10% =
36. 36.440 increased by 15% =
37. 37.350 decreased by 8% =
38. 38.425 increased by 8% =
39. 39.145 decreased by 20% =
40. 40.550 increased by 12% =

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