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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 559 · 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. 1.1% of 620 =
  2. 2.10% of 160 =
  3. 3.20% of 230 =
  4. 4.5% of 720 =
  5. 5.50% of 770 =
  6. 6.20% of 210 =
  7. 7.10% of 360 =
  8. 8.50% of 120 =
  9. 9.50% of 620 =
  10. 10.25% of 600 =
  11. 11.50% of 450 =
  12. 12.25% of 20 =
  13. 13.15% of 670 =
  14. 14.25% of 790 =
  15. 15.20% of 790 =
  16. 16.50% of 810 =
  17. 17.15% of 90 =
  18. 18.15% of 530 =
  19. 19.20% of 740 =
  20. 20.10% of 170 =
  21. 21.25% of 330 =
  22. 22.15% of 130 =
  23. 23.20% of 220 =
  24. 24.15% of 240 =
  25. 25.25% of 730 =
  26. 26.10% of 360 =
  27. 27.5% of 520 =
  28. 28.5% of 500 =
  29. 29.25% of 270 =
  30. 30.5% of 770 =
  31. 31.10% of 850 =
  32. 32.5% of 100 =
  33. 33.25% of 390 =
  34. 34.5% of 470 =
  35. 35.15% of 220 =
  36. 36.20% of 280 =
  37. 37.50% of 280 =
  38. 38.1% of 120 =
  39. 39.1% of 630 =
  40. 40.25% of 20 =

Answer key

  1. 6.2
  2. 16
  3. 46
  4. 36
  5. 385
  6. 42
  7. 36
  8. 60
  9. 310
  10. 150
  11. 225
  12. 5
  13. 100.5
  14. 197.5
  15. 158
  16. 405
  17. 13.5
  18. 79.5
  19. 148
  20. 17
  21. 82.5
  22. 19.5
  23. 44
  24. 36
  25. 182.5
  26. 36
  27. 26
  28. 25
  29. 67.5
  30. 38.5
  31. 85
  32. 5
  33. 97.5
  34. 23.5
  35. 33
  36. 56
  37. 140
  38. 1.2
  39. 6.3
  40. 5

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