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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 671 · 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 70 =
  2. 2.1% of 870 =
  3. 3.10% of 610 =
  4. 4.1% of 470 =
  5. 5.15% of 20 =
  6. 6.20% of 410 =
  7. 7.1% of 410 =
  8. 8.50% of 580 =
  9. 9.5% of 250 =
  10. 10.5% of 150 =
  11. 11.20% of 560 =
  12. 12.5% of 850 =
  13. 13.5% of 820 =
  14. 14.10% of 510 =
  15. 15.25% of 150 =
  16. 16.50% of 50 =
  17. 17.1% of 390 =
  18. 18.15% of 110 =
  19. 19.1% of 110 =
  20. 20.5% of 370 =
  21. 21.50% of 820 =
  22. 22.25% of 180 =
  23. 23.1% of 900 =
  24. 24.5% of 630 =
  25. 25.5% of 160 =
  26. 26.1% of 320 =
  27. 27.10% of 140 =
  28. 28.5% of 430 =
  29. 29.20% of 170 =
  30. 30.5% of 280 =
  31. 31.25% of 570 =
  32. 32.50% of 740 =
  33. 33.10% of 730 =
  34. 34.20% of 810 =
  35. 35.50% of 660 =
  36. 36.15% of 290 =
  37. 37.20% of 660 =
  38. 38.10% of 40 =
  39. 39.5% of 410 =
  40. 40.5% of 50 =

Answer key

  1. 7
  2. 8.7
  3. 61
  4. 4.7
  5. 3
  6. 82
  7. 4.1
  8. 290
  9. 12.5
  10. 7.5
  11. 112
  12. 42.5
  13. 41
  14. 51
  15. 37.5
  16. 25
  17. 3.9
  18. 16.5
  19. 1.1
  20. 18.5
  21. 410
  22. 45
  23. 9
  24. 31.5
  25. 8
  26. 3.2
  27. 14
  28. 21.5
  29. 34
  30. 14
  31. 142.5
  32. 370
  33. 73
  34. 162
  35. 330
  36. 43.5
  37. 132
  38. 4
  39. 20.5
  40. 2.5

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