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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 534 · 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. 1.1% of 630 =
  2. 2.50% of 230 =
  3. 3.50% of 250 =
  4. 4.5% of 530 =
  5. 5.10% of 340 =
  6. 6.10% of 890 =
  7. 7.1% of 280 =
  8. 8.10% of 380 =
  9. 9.20% of 730 =
  10. 10.5% of 280 =
  11. 11.25% of 680 =
  12. 12.50% of 870 =
  13. 13.5% of 200 =
  14. 14.25% of 430 =
  15. 15.15% of 730 =
  16. 16.5% of 140 =
  17. 17.1% of 130 =
  18. 18.50% of 670 =
  19. 19.15% of 90 =
  20. 20.50% of 360 =
  21. 21.50% of 180 =
  22. 22.50% of 140 =
  23. 23.1% of 230 =
  24. 24.1% of 790 =
  25. 25.20% of 410 =
  26. 26.50% of 850 =
  27. 27.50% of 90 =
  28. 28.10% of 770 =
  29. 29.20% of 460 =
  30. 30.15% of 260 =
  31. 31.15% of 430 =
  32. 32.1% of 850 =
  33. 33.20% of 890 =
  34. 34.15% of 700 =
  35. 35.1% of 720 =
  36. 36.15% of 860 =
  37. 37.20% of 860 =
  38. 38.25% of 570 =
  39. 39.5% of 350 =
  40. 40.10% of 120 =

Answer key

  1. 6.3
  2. 115
  3. 125
  4. 26.5
  5. 34
  6. 89
  7. 2.8
  8. 38
  9. 146
  10. 14
  11. 170
  12. 435
  13. 10
  14. 107.5
  15. 109.5
  16. 7
  17. 1.3
  18. 335
  19. 13.5
  20. 180
  21. 90
  22. 70
  23. 2.3
  24. 7.9
  25. 82
  26. 425
  27. 45
  28. 77
  29. 92
  30. 39
  31. 64.5
  32. 8.5
  33. 178
  34. 105
  35. 7.2
  36. 129
  37. 172
  38. 142.5
  39. 17.5
  40. 12

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