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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 516 · 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 400 =
  2. 2.1% of 390 =
  3. 3.5% of 230 =
  4. 4.10% of 280 =
  5. 5.15% of 610 =
  6. 6.50% of 250 =
  7. 7.10% of 570 =
  8. 8.10% of 350 =
  9. 9.50% of 520 =
  10. 10.25% of 340 =
  11. 11.5% of 810 =
  12. 12.1% of 320 =
  13. 13.25% of 710 =
  14. 14.5% of 220 =
  15. 15.15% of 260 =
  16. 16.5% of 170 =
  17. 17.5% of 290 =
  18. 18.50% of 710 =
  19. 19.50% of 120 =
  20. 20.1% of 790 =
  21. 21.10% of 310 =
  22. 22.25% of 160 =
  23. 23.50% of 580 =
  24. 24.20% of 240 =
  25. 25.10% of 60 =
  26. 26.10% of 660 =
  27. 27.5% of 600 =
  28. 28.25% of 310 =
  29. 29.25% of 690 =
  30. 30.20% of 770 =
  31. 31.5% of 530 =
  32. 32.10% of 140 =
  33. 33.15% of 140 =
  34. 34.15% of 180 =
  35. 35.5% of 90 =
  36. 36.15% of 210 =
  37. 37.1% of 220 =
  38. 38.10% of 440 =
  39. 39.25% of 710 =
  40. 40.20% of 820 =

Answer key

  1. 20
  2. 3.9
  3. 11.5
  4. 28
  5. 91.5
  6. 125
  7. 57
  8. 35
  9. 260
  10. 85
  11. 40.5
  12. 3.2
  13. 177.5
  14. 11
  15. 39
  16. 8.5
  17. 14.5
  18. 355
  19. 60
  20. 7.9
  21. 31
  22. 40
  23. 290
  24. 48
  25. 6
  26. 66
  27. 30
  28. 77.5
  29. 172.5
  30. 154
  31. 26.5
  32. 14
  33. 21
  34. 27
  35. 4.5
  36. 31.5
  37. 2.2
  38. 44
  39. 177.5
  40. 164

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