Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 541 · 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. 1.104 decreased by 75% =
2. 2.348 increased by 75% =
3. 3.115 decreased by 40% =
4. 4.295 increased by 60% =
5. 5.520 decreased by 5% =
6. 6.670 increased by 60% =
7. 7.400 decreased by 30% =
8. 8.780 increased by 35% =
9. 9.175 decreased by 8% =
10. 10.688 increased by 25% =
11. 11.560 decreased by 15% =
12. 12.250 increased by 8% =
13. 13.696 decreased by 25% =
14. 14.220 decreased by 15% =
15. 15.225 decreased by 8% =
16. 16.100 increased by 25% =
17. 17.600 increased by 12% =
18. 18.525 increased by 40% =
19. 19.100 increased by 35% =
20. 20.660 decreased by 20% =
21. 21.750 increased by 40% =
22. 22.240 increased by 5% =
23. 23.480 decreased by 30% =
24. 24.385 decreased by 60% =
25. 25.390 decreased by 20% =
26. 26.152 increased by 75% =
27. 27.520 decreased by 5% =
28. 28.560 increased by 10% =
29. 29.735 increased by 20% =
30. 30.666 decreased by 50% =
31. 31.750 decreased by 12% =
32. 32.270 decreased by 10% =
33. 33.160 decreased by 40% =
34. 34.308 increased by 25% =
35. 35.660 decreased by 35% =
36. 36.604 increased by 25% =
37. 37.385 increased by 60% =
38. 38.512 increased by 25% =
39. 39.50 decreased by 10% =
40. 40.60 decreased by 30% =

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