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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 444 · 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. 1.50% of 900 =
  2. 2.25% of 100 =
  3. 3.25% of 480 =
  4. 4.15% of 430 =
  5. 5.10% of 40 =
  6. 6.20% of 490 =
  7. 7.50% of 170 =
  8. 8.15% of 820 =
  9. 9.20% of 640 =
  10. 10.15% of 250 =
  11. 11.10% of 590 =
  12. 12.10% of 360 =
  13. 13.15% of 70 =
  14. 14.50% of 310 =
  15. 15.1% of 780 =
  16. 16.20% of 50 =
  17. 17.5% of 230 =
  18. 18.50% of 620 =
  19. 19.50% of 180 =
  20. 20.20% of 100 =
  21. 21.25% of 430 =
  22. 22.5% of 320 =
  23. 23.50% of 370 =
  24. 24.1% of 510 =
  25. 25.1% of 620 =
  26. 26.25% of 300 =
  27. 27.25% of 370 =
  28. 28.50% of 160 =
  29. 29.50% of 440 =
  30. 30.5% of 540 =
  31. 31.5% of 440 =
  32. 32.20% of 490 =
  33. 33.20% of 650 =
  34. 34.10% of 300 =
  35. 35.20% of 430 =
  36. 36.50% of 400 =
  37. 37.25% of 730 =
  38. 38.1% of 760 =
  39. 39.10% of 320 =
  40. 40.5% of 90 =

Answer key

  1. 450
  2. 25
  3. 120
  4. 64.5
  5. 4
  6. 98
  7. 85
  8. 123
  9. 128
  10. 37.5
  11. 59
  12. 36
  13. 10.5
  14. 155
  15. 7.8
  16. 10
  17. 11.5
  18. 310
  19. 90
  20. 20
  21. 107.5
  22. 16
  23. 185
  24. 5.1
  25. 6.2
  26. 75
  27. 92.5
  28. 80
  29. 220
  30. 27
  31. 22
  32. 98
  33. 130
  34. 30
  35. 86
  36. 200
  37. 182.5
  38. 7.6
  39. 32
  40. 4.5

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