Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 786 · 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. 1.50 increased by 30% =
2. 2.600 increased by 5% =
3. 3.620 decreased by 25% =
4. 4.688 increased by 75% =
5. 5.180 increased by 5% =
6. 6.480 increased by 5% =
7. 7.100 increased by 12% =
8. 8.525 decreased by 12% =
9. 9.96 increased by 75% =
10. 10.340 decreased by 5% =
11. 11.600 decreased by 30% =
12. 12.700 increased by 20% =
13. 13.196 increased by 25% =
14. 14.696 decreased by 25% =
15. 15.295 decreased by 20% =
16. 16.750 decreased by 12% =
17. 17.630 increased by 40% =
18. 18.740 decreased by 15% =
19. 19.375 increased by 8% =
20. 20.240 increased by 10% =
21. 21.380 decreased by 10% =
22. 22.52 increased by 75% =
23. 23.400 increased by 8% =
24. 24.400 increased by 5% =
25. 25.375 increased by 60% =
26. 26.150 decreased by 8% =
27. 27.270 decreased by 60% =
28. 28.768 decreased by 75% =
29. 29.210 decreased by 50% =
30. 30.704 decreased by 75% =
31. 31.740 increased by 15% =
32. 32.200 decreased by 35% =
33. 33.472 increased by 75% =
34. 34.356 increased by 75% =
35. 35.700 increased by 75% =
36. 36.512 decreased by 75% =
37. 37.405 increased by 40% =
38. 38.76 decreased by 75% =
39. 39.490 decreased by 60% =
40. 40.255 increased by 20% =

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