Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 554 · 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. 1.320 increased by 10% =
2. 2.800 increased by 10% =
3. 3.280 increased by 35% =
4. 4.275 increased by 8% =
5. 5.380 decreased by 5% =
6. 6.650 decreased by 8% =
7. 7.270 decreased by 30% =
8. 8.668 increased by 50% =
9. 9.324 increased by 25% =
10. 10.675 increased by 8% =
11. 11.750 increased by 10% =
12. 12.120 decreased by 30% =
13. 13.528 increased by 25% =
14. 14.65 decreased by 60% =
15. 15.705 decreased by 40% =
16. 16.115 increased by 40% =
17. 17.80 decreased by 5% =
18. 18.600 decreased by 5% =
19. 19.400 increased by 12% =
20. 20.580 decreased by 35% =
21. 21.375 increased by 8% =
22. 22.520 increased by 15% =
23. 23.495 increased by 60% =
24. 24.676 decreased by 25% =
25. 25.660 decreased by 30% =
26. 26.475 increased by 20% =
27. 27.480 increased by 15% =
28. 28.80 decreased by 35% =
29. 29.450 increased by 10% =
30. 30.645 decreased by 20% =
31. 31.620 decreased by 5% =
32. 32.380 increased by 5% =
33. 33.574 decreased by 50% =
34. 34.195 increased by 60% =
35. 35.660 increased by 15% =
36. 36.305 increased by 20% =
37. 37.630 decreased by 10% =
38. 38.120 increased by 5% =
39. 39.180 decreased by 15% =
40. 40.550 decreased by 8% =

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