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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 361 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.5% of 270 =
  2. 2.25% of 720 =
  3. 3.20% of 340 =
  4. 4.15% of 380 =
  5. 5.5% of 40 =
  6. 6.25% of 140 =
  7. 7.20% of 410 =
  8. 8.25% of 460 =
  9. 9.20% of 630 =
  10. 10.10% of 770 =
  11. 11.50% of 440 =
  12. 12.25% of 620 =
  13. 13.1% of 740 =
  14. 14.10% of 280 =
  15. 15.20% of 710 =
  16. 16.5% of 750 =
  17. 17.25% of 670 =
  18. 18.25% of 260 =
  19. 19.15% of 620 =
  20. 20.10% of 490 =
  21. 21.1% of 350 =
  22. 22.50% of 750 =
  23. 23.1% of 220 =
  24. 24.20% of 380 =
  25. 25.20% of 790 =
  26. 26.5% of 530 =
  27. 27.25% of 440 =
  28. 28.10% of 800 =
  29. 29.1% of 870 =
  30. 30.20% of 80 =
  31. 31.10% of 390 =
  32. 32.50% of 130 =
  33. 33.10% of 210 =
  34. 34.15% of 560 =
  35. 35.20% of 50 =
  36. 36.10% of 730 =
  37. 37.15% of 60 =
  38. 38.1% of 40 =
  39. 39.20% of 610 =
  40. 40.50% of 590 =

Answer key

  1. 13.5
  2. 180
  3. 68
  4. 57
  5. 2
  6. 35
  7. 82
  8. 115
  9. 126
  10. 77
  11. 220
  12. 155
  13. 7.4
  14. 28
  15. 142
  16. 37.5
  17. 167.5
  18. 65
  19. 93
  20. 49
  21. 3.5
  22. 375
  23. 2.2
  24. 76
  25. 158
  26. 26.5
  27. 110
  28. 80
  29. 8.7
  30. 16
  31. 39
  32. 65
  33. 21
  34. 84
  35. 10
  36. 73
  37. 9
  38. 0.4
  39. 122
  40. 295

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