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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 153 · 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 220 =
  2. 2.5% of 270 =
  3. 3.15% of 460 =
  4. 4.10% of 290 =
  5. 5.15% of 650 =
  6. 6.10% of 340 =
  7. 7.25% of 600 =
  8. 8.50% of 820 =
  9. 9.10% of 230 =
  10. 10.5% of 320 =
  11. 11.5% of 860 =
  12. 12.50% of 660 =
  13. 13.25% of 690 =
  14. 14.20% of 850 =
  15. 15.20% of 480 =
  16. 16.1% of 900 =
  17. 17.20% of 890 =
  18. 18.10% of 340 =
  19. 19.1% of 540 =
  20. 20.15% of 790 =
  21. 21.5% of 550 =
  22. 22.20% of 40 =
  23. 23.50% of 520 =
  24. 24.25% of 390 =
  25. 25.15% of 80 =
  26. 26.20% of 890 =
  27. 27.20% of 770 =
  28. 28.1% of 320 =
  29. 29.1% of 20 =
  30. 30.5% of 360 =
  31. 31.15% of 270 =
  32. 32.10% of 730 =
  33. 33.50% of 190 =
  34. 34.20% of 350 =
  35. 35.5% of 350 =
  36. 36.10% of 210 =
  37. 37.10% of 150 =
  38. 38.20% of 80 =
  39. 39.5% of 90 =
  40. 40.10% of 60 =

Answer key

  1. 44
  2. 13.5
  3. 69
  4. 29
  5. 97.5
  6. 34
  7. 150
  8. 410
  9. 23
  10. 16
  11. 43
  12. 330
  13. 172.5
  14. 170
  15. 96
  16. 9
  17. 178
  18. 34
  19. 5.4
  20. 118.5
  21. 27.5
  22. 8
  23. 260
  24. 97.5
  25. 12
  26. 178
  27. 154
  28. 3.2
  29. 0.2
  30. 18
  31. 40.5
  32. 73
  33. 95
  34. 70
  35. 17.5
  36. 21
  37. 15
  38. 16
  39. 4.5
  40. 6

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