Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 735 · 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 increased by 35% =
2. 2.795 decreased by 40% =
3. 3.640 decreased by 10% =
4. 4.80 decreased by 5% =
5. 5.400 decreased by 60% =
6. 6.40 increased by 35% =
7. 7.210 increased by 40% =
8. 8.680 decreased by 30% =
9. 9.190 increased by 30% =
10. 10.540 decreased by 35% =
11. 11.638 increased by 50% =
12. 12.780 decreased by 60% =
13. 13.460 decreased by 40% =
14. 14.675 increased by 8% =
15. 15.604 decreased by 25% =
16. 16.45 increased by 60% =
17. 17.625 decreased by 12% =
18. 18.608 increased by 50% =
19. 19.80 decreased by 15% =
20. 20.200 increased by 30% =
21. 21.240 decreased by 5% =
22. 22.125 decreased by 40% =
23. 23.520 increased by 15% =
24. 24.540 decreased by 15% =
25. 25.780 increased by 30% =
26. 26.40 decreased by 35% =
27. 27.530 decreased by 10% =
28. 28.630 decreased by 10% =
29. 29.274 increased by 50% =
30. 30.350 increased by 30% =
31. 31.790 increased by 20% =
32. 32.360 increased by 50% =
33. 33.336 decreased by 25% =
34. 34.550 decreased by 12% =
35. 35.684 decreased by 25% =
36. 36.272 decreased by 50% =
37. 37.175 increased by 8% =
38. 38.280 decreased by 60% =
39. 39.580 decreased by 35% =
40. 40.620 increased by 5% =

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