Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 682 · 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. 1.740 decreased by 5% =
2. 2.200 decreased by 8% =
3. 3.660 increased by 35% =
4. 4.260 decreased by 15% =
5. 5.375 increased by 8% =
6. 6.120 decreased by 5% =
7. 7.570 decreased by 10% =
8. 8.640 decreased by 30% =
9. 9.680 increased by 50% =
10. 10.370 increased by 10% =
11. 11.380 decreased by 60% =
12. 12.700 decreased by 40% =
13. 13.460 increased by 40% =
14. 14.340 increased by 5% =
15. 15.605 decreased by 20% =
16. 16.80 decreased by 15% =
17. 17.250 decreased by 8% =
18. 18.45 decreased by 20% =
19. 19.520 decreased by 5% =
20. 20.572 increased by 75% =
21. 21.230 decreased by 10% =
22. 22.240 decreased by 5% =
23. 23.235 decreased by 40% =
24. 24.280 decreased by 25% =
25. 25.676 decreased by 75% =
26. 26.345 increased by 60% =
27. 27.800 decreased by 5% =
28. 28.685 increased by 60% =
29. 29.700 increased by 60% =
30. 30.708 decreased by 25% =
31. 31.640 decreased by 10% =
32. 32.125 decreased by 8% =
33. 33.620 increased by 10% =
34. 34.455 decreased by 40% =
35. 35.240 decreased by 35% =
36. 36.92 decreased by 25% =
37. 37.375 decreased by 20% =
38. 38.385 decreased by 20% =
39. 39.780 increased by 15% =
40. 40.315 decreased by 60% =

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