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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 550 · 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. 2.20% of 230 =
  3. 3.15% of 50 =
  4. 4.1% of 800 =
  5. 5.15% of 240 =
  6. 6.5% of 540 =
  7. 7.5% of 500 =
  8. 8.20% of 190 =
  9. 9.50% of 190 =
  10. 10.50% of 510 =
  11. 11.1% of 50 =
  12. 12.50% of 860 =
  13. 13.5% of 390 =
  14. 14.10% of 210 =
  15. 15.15% of 300 =
  16. 16.15% of 160 =
  17. 17.1% of 200 =
  18. 18.50% of 60 =
  19. 19.1% of 70 =
  20. 20.25% of 730 =
  21. 21.20% of 270 =
  22. 22.50% of 90 =
  23. 23.50% of 590 =
  24. 24.25% of 510 =
  25. 25.25% of 140 =
  26. 26.5% of 660 =
  27. 27.20% of 660 =
  28. 28.20% of 140 =
  29. 29.10% of 390 =
  30. 30.20% of 330 =
  31. 31.25% of 390 =
  32. 32.50% of 160 =
  33. 33.20% of 740 =
  34. 34.15% of 170 =
  35. 35.25% of 220 =
  36. 36.20% of 790 =
  37. 37.25% of 410 =
  38. 38.5% of 470 =
  39. 39.20% of 340 =
  40. 40.10% of 790 =

Answer key

  1. 20
  2. 46
  3. 7.5
  4. 8
  5. 36
  6. 27
  7. 25
  8. 38
  9. 95
  10. 255
  11. 0.5
  12. 430
  13. 19.5
  14. 21
  15. 45
  16. 24
  17. 2
  18. 30
  19. 0.7
  20. 182.5
  21. 54
  22. 45
  23. 295
  24. 127.5
  25. 35
  26. 33
  27. 132
  28. 28
  29. 39
  30. 66
  31. 97.5
  32. 80
  33. 148
  34. 25.5
  35. 55
  36. 158
  37. 102.5
  38. 23.5
  39. 68
  40. 79

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