Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 857 · 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. 1.700 decreased by 5% =
2. 2.780 increased by 35% =
3. 3.680 increased by 35% =
4. 4.65 decreased by 60% =
5. 5.125 decreased by 8% =
6. 6.280 decreased by 60% =
7. 7.360 increased by 35% =
8. 8.485 decreased by 40% =
9. 9.408 increased by 75% =
10. 10.200 decreased by 15% =
11. 11.90 increased by 40% =
12. 12.276 decreased by 75% =
13. 13.310 increased by 20% =
14. 14.468 increased by 75% =
15. 15.560 increased by 20% =
16. 16.390 decreased by 30% =
17. 17.704 decreased by 25% =
18. 18.750 increased by 8% =
19. 19.540 decreased by 15% =
20. 20.770 decreased by 10% =
21. 21.200 increased by 5% =
22. 22.100 increased by 15% =
23. 23.130 increased by 30% =
24. 24.48 increased by 75% =
25. 25.405 increased by 40% =
26. 26.490 increased by 30% =
27. 27.490 increased by 30% =
28. 28.645 decreased by 20% =
29. 29.345 decreased by 40% =
30. 30.700 increased by 5% =
31. 31.200 increased by 15% =
32. 32.364 decreased by 25% =
33. 33.718 increased by 50% =
34. 34.100 increased by 10% =
35. 35.520 decreased by 35% =
36. 36.75 decreased by 8% =
37. 37.80 decreased by 15% =
38. 38.694 decreased by 50% =
39. 39.540 increased by 25% =
40. 40.64 decreased by 25% =

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