Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 35 · 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. 1.488 decreased by 50% =
2. 2.60 decreased by 35% =
3. 3.612 increased by 75% =
4. 4.75 increased by 60% =
5. 5.792 decreased by 25% =
6. 6.650 increased by 20% =
7. 7.360 decreased by 5% =
8. 8.700 increased by 5% =
9. 9.512 decreased by 25% =
10. 10.750 decreased by 8% =
11. 11.225 decreased by 8% =
12. 12.175 increased by 12% =
13. 13.500 decreased by 60% =
14. 14.676 decreased by 25% =
15. 15.660 decreased by 10% =
16. 16.302 increased by 50% =
17. 17.240 increased by 15% =
18. 18.740 increased by 10% =
19. 19.795 increased by 40% =
20. 20.460 decreased by 15% =
21. 21.50 decreased by 12% =
22. 22.535 increased by 40% =
23. 23.740 decreased by 15% =
24. 24.790 decreased by 60% =
25. 25.500 increased by 35% =
26. 26.64 increased by 75% =
27. 27.184 increased by 25% =
28. 28.220 increased by 15% =
29. 29.100 increased by 60% =
30. 30.180 increased by 5% =
31. 31.320 increased by 30% =
32. 32.280 decreased by 5% =
33. 33.700 decreased by 50% =
34. 34.775 decreased by 20% =
35. 35.620 increased by 20% =
36. 36.270 decreased by 10% =
37. 37.615 increased by 60% =
38. 38.95 decreased by 20% =
39. 39.640 increased by 15% =
40. 40.770 decreased by 30% =

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