Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 863 · 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. 1.540 increased by 5% =
2. 2.584 increased by 75% =
3. 3.658 increased by 50% =
4. 4.192 decreased by 75% =
5. 5.400 decreased by 12% =
6. 6.208 increased by 75% =
7. 7.200 decreased by 5% =
8. 8.720 decreased by 20% =
9. 9.624 increased by 25% =
10. 10.500 increased by 40% =
11. 11.345 decreased by 60% =
12. 12.640 decreased by 15% =
13. 13.448 decreased by 75% =
14. 14.800 increased by 15% =
15. 15.75 decreased by 8% =
16. 16.155 decreased by 40% =
17. 17.45 decreased by 60% =
18. 18.510 increased by 30% =
19. 19.435 decreased by 20% =
20. 20.580 increased by 50% =
21. 21.572 increased by 50% =
22. 22.350 increased by 12% =
23. 23.185 increased by 60% =
24. 24.220 increased by 75% =
25. 25.700 increased by 12% =
26. 26.410 decreased by 10% =
27. 27.560 decreased by 20% =
28. 28.480 increased by 30% =
29. 29.140 increased by 75% =
30. 30.600 decreased by 25% =
31. 31.240 decreased by 40% =
32. 32.640 increased by 35% =
33. 33.446 increased by 50% =
34. 34.480 increased by 5% =
35. 35.575 increased by 12% =
36. 36.375 decreased by 8% =
37. 37.40 increased by 5% =
38. 38.88 decreased by 75% =
39. 39.230 decreased by 10% =
40. 40.320 increased by 15% =

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