Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 203 · 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. 1.250 increased by 10% =
2. 2.676 decreased by 75% =
3. 3.800 increased by 12% =
4. 4.580 decreased by 35% =
5. 5.100 decreased by 5% =
6. 6.200 increased by 12% =
7. 7.300 increased by 10% =
8. 8.760 increased by 25% =
9. 9.460 increased by 75% =
10. 10.630 increased by 40% =
11. 11.760 decreased by 5% =
12. 12.495 increased by 60% =
13. 13.420 decreased by 35% =
14. 14.550 decreased by 12% =
15. 15.548 decreased by 25% =
16. 16.454 decreased by 50% =
17. 17.620 decreased by 10% =
18. 18.505 decreased by 20% =
19. 19.540 increased by 5% =
20. 20.160 decreased by 15% =
21. 21.700 decreased by 35% =
22. 22.130 increased by 10% =
23. 23.420 increased by 35% =
24. 24.220 decreased by 60% =
25. 25.755 increased by 20% =
26. 26.80 increased by 35% =
27. 27.580 decreased by 35% =
28. 28.320 increased by 40% =
29. 29.395 decreased by 40% =
30. 30.445 increased by 60% =
31. 31.640 increased by 10% =
32. 32.725 decreased by 12% =
33. 33.650 decreased by 20% =
34. 34.290 increased by 10% =
35. 35.700 decreased by 12% =
36. 36.175 decreased by 8% =
37. 37.575 decreased by 12% =
38. 38.400 decreased by 60% =
39. 39.660 decreased by 5% =
40. 40.320 decreased by 30% =

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