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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 27 · 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. 2.20% of 480 =
  3. 3.50% of 420 =
  4. 4.20% of 770 =
  5. 5.50% of 420 =
  6. 6.15% of 100 =
  7. 7.10% of 50 =
  8. 8.10% of 130 =
  9. 9.10% of 580 =
  10. 10.1% of 40 =
  11. 11.1% of 130 =
  12. 12.5% of 60 =
  13. 13.1% of 650 =
  14. 14.25% of 290 =
  15. 15.10% of 620 =
  16. 16.10% of 200 =
  17. 17.10% of 550 =
  18. 18.50% of 520 =
  19. 19.15% of 860 =
  20. 20.5% of 870 =
  21. 21.50% of 730 =
  22. 22.25% of 820 =
  23. 23.5% of 530 =
  24. 24.10% of 120 =
  25. 25.5% of 630 =
  26. 26.50% of 170 =
  27. 27.10% of 130 =
  28. 28.10% of 880 =
  29. 29.10% of 820 =
  30. 30.15% of 230 =
  31. 31.5% of 470 =
  32. 32.5% of 600 =
  33. 33.1% of 690 =
  34. 34.15% of 790 =
  35. 35.10% of 560 =
  36. 36.50% of 320 =
  37. 37.5% of 370 =
  38. 38.25% of 270 =
  39. 39.1% of 230 =
  40. 40.5% of 710 =

Answer key

  1. 44
  2. 96
  3. 210
  4. 154
  5. 210
  6. 15
  7. 5
  8. 13
  9. 58
  10. 0.4
  11. 1.3
  12. 3
  13. 6.5
  14. 72.5
  15. 62
  16. 20
  17. 55
  18. 260
  19. 129
  20. 43.5
  21. 365
  22. 205
  23. 26.5
  24. 12
  25. 31.5
  26. 85
  27. 13
  28. 88
  29. 82
  30. 34.5
  31. 23.5
  32. 30
  33. 6.9
  34. 118.5
  35. 56
  36. 160
  37. 18.5
  38. 67.5
  39. 2.3
  40. 35.5

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