Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 875 · 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 20% =
2. 2.350 increased by 30% =
3. 3.800 increased by 12% =
4. 4.700 decreased by 12% =
5. 5.125 decreased by 8% =
6. 6.225 increased by 8% =
7. 7.60 decreased by 10% =
8. 8.650 increased by 12% =
9. 9.768 increased by 25% =
10. 10.500 decreased by 40% =
11. 11.300 increased by 20% =
12. 12.124 increased by 25% =
13. 13.420 increased by 15% =
14. 14.635 decreased by 60% =
15. 15.725 decreased by 12% =
16. 16.190 decreased by 10% =
17. 17.365 increased by 20% =
18. 18.250 decreased by 8% =
19. 19.528 increased by 25% =
20. 20.300 decreased by 15% =
21. 21.780 decreased by 5% =
22. 22.220 decreased by 20% =
23. 23.50 decreased by 8% =
24. 24.120 decreased by 15% =
25. 25.100 decreased by 35% =
26. 26.164 decreased by 25% =
27. 27.796 decreased by 25% =
28. 28.775 decreased by 12% =
29. 29.284 increased by 75% =
30. 30.780 decreased by 10% =
31. 31.615 decreased by 20% =
32. 32.75 decreased by 8% =
33. 33.644 decreased by 25% =
34. 34.480 increased by 5% =
35. 35.580 increased by 35% =
36. 36.320 decreased by 5% =
37. 37.245 increased by 40% =
38. 38.420 decreased by 20% =
39. 39.136 decreased by 25% =
40. 40.560 increased by 10% =

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