Percentage Increase and Decrease Trick Worksheet

Speed calculation lesson 23: Increase or decrease by a percent · Set 50 · 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. 1.740 increased by 5% =
2. 2.80 decreased by 30% =
3. 3.795 increased by 40% =
4. 4.460 increased by 5% =
5. 5.528 increased by 25% =
6. 6.135 increased by 60% =
7. 7.440 decreased by 5% =
8. 8.44 decreased by 50% =
9. 9.80 decreased by 5% =
10. 10.464 increased by 25% =
11. 11.612 decreased by 75% =
12. 12.680 increased by 5% =
13. 13.440 decreased by 5% =
14. 14.556 decreased by 75% =
15. 15.584 increased by 25% =
16. 16.380 decreased by 5% =
17. 17.376 decreased by 50% =
18. 18.320 increased by 35% =
19. 19.100 decreased by 35% =
20. 20.725 decreased by 8% =
21. 21.800 increased by 35% =
22. 22.640 increased by 5% =
23. 23.620 decreased by 40% =
24. 24.570 increased by 10% =
25. 25.728 increased by 75% =
26. 26.210 decreased by 10% =
27. 27.46 decreased by 50% =
28. 28.675 increased by 8% =
29. 29.60 increased by 15% =
30. 30.220 increased by 40% =
31. 31.800 decreased by 15% =
32. 32.100 increased by 5% =
33. 33.160 decreased by 5% =
34. 34.660 increased by 5% =
35. 35.280 decreased by 15% =
36. 36.92 increased by 25% =
37. 37.220 increased by 10% =
38. 38.60 increased by 40% =
39. 39.452 decreased by 25% =
40. 40.370 increased by 40% =

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