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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 570 · 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. 1.20% of 710 =
  2. 2.5% of 380 =
  3. 3.25% of 250 =
  4. 4.50% of 640 =
  5. 5.15% of 540 =
  6. 6.5% of 640 =
  7. 7.5% of 730 =
  8. 8.1% of 860 =
  9. 9.5% of 230 =
  10. 10.50% of 800 =
  11. 11.1% of 220 =
  12. 12.15% of 520 =
  13. 13.1% of 430 =
  14. 14.15% of 50 =
  15. 15.1% of 410 =
  16. 16.15% of 160 =
  17. 17.20% of 560 =
  18. 18.10% of 70 =
  19. 19.1% of 70 =
  20. 20.25% of 220 =
  21. 21.1% of 470 =
  22. 22.10% of 410 =
  23. 23.5% of 420 =
  24. 24.50% of 580 =
  25. 25.10% of 230 =
  26. 26.15% of 770 =
  27. 27.50% of 600 =
  28. 28.25% of 460 =
  29. 29.15% of 280 =
  30. 30.10% of 350 =
  31. 31.1% of 320 =
  32. 32.10% of 210 =
  33. 33.5% of 770 =
  34. 34.1% of 430 =
  35. 35.10% of 220 =
  36. 36.25% of 140 =
  37. 37.20% of 760 =
  38. 38.10% of 120 =
  39. 39.10% of 670 =
  40. 40.10% of 240 =

Answer key

  1. 142
  2. 19
  3. 62.5
  4. 320
  5. 81
  6. 32
  7. 36.5
  8. 8.6
  9. 11.5
  10. 400
  11. 2.2
  12. 78
  13. 4.3
  14. 7.5
  15. 4.1
  16. 24
  17. 112
  18. 7
  19. 0.7
  20. 55
  21. 4.7
  22. 41
  23. 21
  24. 290
  25. 23
  26. 115.5
  27. 300
  28. 115
  29. 42
  30. 35
  31. 3.2
  32. 21
  33. 38.5
  34. 4.3
  35. 22
  36. 35
  37. 152
  38. 12
  39. 67
  40. 24

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