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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 150 · 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 520 =
  2. 2.20% of 340 =
  3. 3.10% of 70 =
  4. 4.25% of 260 =
  5. 5.20% of 30 =
  6. 6.20% of 450 =
  7. 7.20% of 780 =
  8. 8.10% of 110 =
  9. 9.15% of 230 =
  10. 10.25% of 20 =
  11. 11.10% of 180 =
  12. 12.15% of 770 =
  13. 13.20% of 710 =
  14. 14.5% of 580 =
  15. 15.25% of 900 =
  16. 16.15% of 840 =
  17. 17.20% of 850 =
  18. 18.10% of 430 =
  19. 19.20% of 450 =
  20. 20.5% of 170 =
  21. 21.1% of 560 =
  22. 22.50% of 670 =
  23. 23.15% of 70 =
  24. 24.5% of 190 =
  25. 25.50% of 730 =
  26. 26.1% of 860 =
  27. 27.1% of 830 =
  28. 28.15% of 850 =
  29. 29.10% of 660 =
  30. 30.25% of 140 =
  31. 31.20% of 130 =
  32. 32.15% of 670 =
  33. 33.50% of 570 =
  34. 34.25% of 250 =
  35. 35.5% of 430 =
  36. 36.50% of 780 =
  37. 37.20% of 660 =
  38. 38.10% of 450 =
  39. 39.5% of 580 =
  40. 40.5% of 140 =

Answer key

  1. 260
  2. 68
  3. 7
  4. 65
  5. 6
  6. 90
  7. 156
  8. 11
  9. 34.5
  10. 5
  11. 18
  12. 115.5
  13. 142
  14. 29
  15. 225
  16. 126
  17. 170
  18. 43
  19. 90
  20. 8.5
  21. 5.6
  22. 335
  23. 10.5
  24. 9.5
  25. 365
  26. 8.6
  27. 8.3
  28. 127.5
  29. 66
  30. 35
  31. 26
  32. 100.5
  33. 285
  34. 62.5
  35. 21.5
  36. 390
  37. 132
  38. 45
  39. 29
  40. 7

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