Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 257 · 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. 1.760 increased by 60% =
2. 2.735 decreased by 40% =
3. 3.375 increased by 20% =
4. 4.200 decreased by 8% =
5. 5.290 increased by 20% =
6. 6.550 decreased by 60% =
7. 7.536 decreased by 75% =
8. 8.60 decreased by 60% =
9. 9.140 increased by 60% =
10. 10.60 decreased by 30% =
11. 11.610 decreased by 20% =
12. 12.160 decreased by 15% =
13. 13.380 increased by 35% =
14. 14.640 decreased by 5% =
15. 15.190 increased by 10% =
16. 16.130 increased by 10% =
17. 17.445 increased by 60% =
18. 18.176 decreased by 50% =
19. 19.240 decreased by 10% =
20. 20.620 increased by 5% =
21. 21.676 increased by 50% =
22. 22.785 increased by 60% =
23. 23.125 increased by 40% =
24. 24.305 increased by 20% =
25. 25.400 increased by 15% =
26. 26.440 decreased by 5% =
27. 27.335 decreased by 20% =
28. 28.230 increased by 10% =
29. 29.630 increased by 60% =
30. 30.415 decreased by 60% =
31. 31.720 decreased by 15% =
32. 32.52 increased by 50% =
33. 33.520 increased by 10% =
34. 34.500 decreased by 30% =
35. 35.340 increased by 5% =
36. 36.272 decreased by 25% =
37. 37.745 increased by 20% =
38. 38.70 decreased by 10% =
39. 39.100 increased by 25% =
40. 40.220 decreased by 30% =

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