Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 239 · 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. 1.520 increased by 35% =
2. 2.214 increased by 50% =
3. 3.50 increased by 10% =
4. 4.556 increased by 75% =
5. 5.44 increased by 75% =
6. 6.220 increased by 30% =
7. 7.525 increased by 8% =
8. 8.712 increased by 25% =
9. 9.140 increased by 5% =
10. 10.240 decreased by 20% =
11. 11.565 increased by 40% =
12. 12.650 increased by 12% =
13. 13.120 decreased by 15% =
14. 14.740 increased by 35% =
15. 15.250 increased by 8% =
16. 16.550 increased by 60% =
17. 17.212 decreased by 50% =
18. 18.580 increased by 75% =
19. 19.150 decreased by 12% =
20. 20.300 increased by 50% =
21. 21.780 increased by 30% =
22. 22.800 decreased by 8% =
23. 23.60 increased by 5% =
24. 24.280 increased by 5% =
25. 25.280 decreased by 35% =
26. 26.560 increased by 35% =
27. 27.60 decreased by 50% =
28. 28.595 increased by 20% =
29. 29.335 decreased by 20% =
30. 30.770 decreased by 10% =
31. 31.600 increased by 15% =
32. 32.660 decreased by 15% =
33. 33.200 decreased by 15% =
34. 34.480 decreased by 35% =
35. 35.310 increased by 10% =
36. 36.424 decreased by 50% =
37. 37.500 decreased by 35% =
38. 38.196 decreased by 50% =
39. 39.600 increased by 8% =
40. 40.125 increased by 12% =

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