Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 983 · 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. 1.440 decreased by 20% =
2. 2.240 increased by 5% =
3. 3.216 increased by 25% =
4. 4.60 increased by 5% =
5. 5.640 increased by 10% =
6. 6.600 decreased by 5% =
7. 7.640 decreased by 15% =
8. 8.588 increased by 25% =
9. 9.520 increased by 10% =
10. 10.195 decreased by 60% =
11. 11.796 increased by 25% =
12. 12.412 increased by 75% =
13. 13.130 increased by 10% =
14. 14.700 increased by 30% =
15. 15.430 increased by 60% =
16. 16.315 increased by 20% =
17. 17.148 decreased by 50% =
18. 18.445 increased by 20% =
19. 19.50 increased by 30% =
20. 20.170 increased by 40% =
21. 21.560 decreased by 35% =
22. 22.195 increased by 20% =
23. 23.540 decreased by 35% =
24. 24.770 increased by 30% =
25. 25.100 decreased by 5% =
26. 26.520 decreased by 5% =
27. 27.525 decreased by 8% =
28. 28.352 increased by 75% =
29. 29.750 decreased by 30% =
30. 30.315 increased by 20% =
31. 31.84 increased by 75% =
32. 32.456 increased by 50% =
33. 33.80 increased by 5% =
34. 34.630 increased by 10% =
35. 35.640 decreased by 35% =
36. 36.95 decreased by 40% =
37. 37.716 increased by 25% =
38. 38.190 increased by 40% =
39. 39.310 decreased by 30% =
40. 40.220 decreased by 10% =

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