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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 53 · 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. 1.10% of 230 =
  2. 2.50% of 620 =
  3. 3.10% of 20 =
  4. 4.5% of 560 =
  5. 5.50% of 850 =
  6. 6.5% of 370 =
  7. 7.50% of 470 =
  8. 8.5% of 200 =
  9. 9.25% of 430 =
  10. 10.5% of 470 =
  11. 11.5% of 80 =
  12. 12.50% of 750 =
  13. 13.25% of 400 =
  14. 14.15% of 410 =
  15. 15.10% of 700 =
  16. 16.1% of 120 =
  17. 17.50% of 170 =
  18. 18.1% of 390 =
  19. 19.5% of 540 =
  20. 20.5% of 750 =
  21. 21.20% of 40 =
  22. 22.10% of 530 =
  23. 23.15% of 120 =
  24. 24.15% of 850 =
  25. 25.1% of 550 =
  26. 26.50% of 330 =
  27. 27.1% of 850 =
  28. 28.25% of 180 =
  29. 29.15% of 730 =
  30. 30.20% of 230 =
  31. 31.10% of 170 =
  32. 32.5% of 390 =
  33. 33.1% of 130 =
  34. 34.25% of 270 =
  35. 35.1% of 900 =
  36. 36.5% of 160 =
  37. 37.50% of 40 =
  38. 38.50% of 220 =
  39. 39.1% of 730 =
  40. 40.50% of 130 =

Answer key

  1. 23
  2. 310
  3. 2
  4. 28
  5. 425
  6. 18.5
  7. 235
  8. 10
  9. 107.5
  10. 23.5
  11. 4
  12. 375
  13. 100
  14. 61.5
  15. 70
  16. 1.2
  17. 85
  18. 3.9
  19. 27
  20. 37.5
  21. 8
  22. 53
  23. 18
  24. 127.5
  25. 5.5
  26. 165
  27. 8.5
  28. 45
  29. 109.5
  30. 46
  31. 17
  32. 19.5
  33. 1.3
  34. 67.5
  35. 9
  36. 8
  37. 20
  38. 110
  39. 7.3
  40. 65

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