Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 823 · 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. 1.140 increased by 35% =
2. 2.160 increased by 25% =
3. 3.340 decreased by 35% =
4. 4.550 increased by 12% =
5. 5.80 increased by 20% =
6. 6.630 decreased by 30% =
7. 7.600 increased by 60% =
8. 8.132 increased by 25% =
9. 9.100 decreased by 8% =
10. 10.800 decreased by 10% =
11. 11.516 increased by 50% =
12. 12.700 increased by 12% =
13. 13.760 decreased by 10% =
14. 14.200 decreased by 5% =
15. 15.770 increased by 60% =
16. 16.105 decreased by 40% =
17. 17.290 increased by 20% =
18. 18.575 decreased by 8% =
19. 19.712 decreased by 25% =
20. 20.525 increased by 8% =
21. 21.176 increased by 25% =
22. 22.60 decreased by 50% =
23. 23.505 decreased by 40% =
24. 24.300 decreased by 8% =
25. 25.300 increased by 35% =
26. 26.300 decreased by 8% =
27. 27.400 increased by 5% =
28. 28.244 decreased by 75% =
29. 29.550 decreased by 8% =
30. 30.710 increased by 40% =
31. 31.210 decreased by 10% =
32. 32.580 decreased by 5% =
33. 33.700 decreased by 35% =
34. 34.40 decreased by 5% =
35. 35.85 increased by 20% =
36. 36.740 increased by 5% =
37. 37.545 increased by 60% =
38. 38.520 decreased by 25% =
39. 39.530 increased by 50% =
40. 40.560 increased by 10% =

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