Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 807 · 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. 1.525 increased by 60% =
2. 2.360 decreased by 15% =
3. 3.525 increased by 12% =
4. 4.240 increased by 5% =
5. 5.480 increased by 50% =
6. 6.276 decreased by 25% =
7. 7.112 increased by 25% =
8. 8.220 increased by 15% =
9. 9.560 decreased by 10% =
10. 10.650 increased by 30% =
11. 11.680 increased by 30% =
12. 12.630 decreased by 20% =
13. 13.724 increased by 25% =
14. 14.700 increased by 15% =
15. 15.360 decreased by 25% =
16. 16.565 decreased by 20% =
17. 17.700 increased by 40% =
18. 18.50 decreased by 12% =
19. 19.485 increased by 20% =
20. 20.170 increased by 60% =
21. 21.600 decreased by 35% =
22. 22.335 decreased by 20% =
23. 23.190 decreased by 10% =
24. 24.250 increased by 40% =
25. 25.380 increased by 40% =
26. 26.560 increased by 5% =
27. 27.80 increased by 40% =
28. 28.700 decreased by 5% =
29. 29.800 increased by 8% =
30. 30.204 decreased by 50% =
31. 31.286 decreased by 50% =
32. 32.220 increased by 35% =
33. 33.520 decreased by 20% =
34. 34.760 increased by 5% =
35. 35.600 decreased by 30% =
36. 36.715 decreased by 20% =
37. 37.800 decreased by 30% =
38. 38.236 decreased by 25% =
39. 39.336 decreased by 25% =
40. 40.395 increased by 40% =

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