Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 402 · 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. 1.690 increased by 20% =
2. 2.580 increased by 5% =
3. 3.255 decreased by 20% =
4. 4.332 increased by 75% =
5. 5.65 decreased by 60% =
6. 6.554 decreased by 50% =
7. 7.240 decreased by 60% =
8. 8.225 decreased by 8% =
9. 9.540 increased by 60% =
10. 10.392 decreased by 25% =
11. 11.80 decreased by 40% =
12. 12.785 decreased by 40% =
13. 13.336 decreased by 75% =
14. 14.224 increased by 25% =
15. 15.710 increased by 60% =
16. 16.680 increased by 5% =
17. 17.60 increased by 15% =
18. 18.470 increased by 50% =
19. 19.375 decreased by 12% =
20. 20.600 increased by 15% =
21. 21.360 increased by 40% =
22. 22.60 increased by 10% =
23. 23.604 increased by 50% =
24. 24.400 decreased by 35% =
25. 25.340 decreased by 15% =
26. 26.90 increased by 10% =
27. 27.780 increased by 15% =
28. 28.620 increased by 15% =
29. 29.695 decreased by 20% =
30. 30.578 increased by 50% =
31. 31.150 increased by 10% =
32. 32.640 decreased by 30% =
33. 33.660 increased by 35% =
34. 34.460 increased by 15% =
35. 35.265 increased by 20% =
36. 36.650 increased by 8% =
37. 37.480 increased by 5% =
38. 38.700 increased by 12% =
39. 39.705 increased by 60% =
40. 40.124 decreased by 75% =

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