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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 804 · 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. 1.15% of 510 =
  2. 2.10% of 100 =
  3. 3.1% of 120 =
  4. 4.5% of 250 =
  5. 5.20% of 780 =
  6. 6.1% of 530 =
  7. 7.10% of 790 =
  8. 8.50% of 280 =
  9. 9.20% of 60 =
  10. 10.10% of 190 =
  11. 11.10% of 460 =
  12. 12.20% of 710 =
  13. 13.1% of 370 =
  14. 14.15% of 630 =
  15. 15.25% of 870 =
  16. 16.20% of 580 =
  17. 17.20% of 170 =
  18. 18.10% of 360 =
  19. 19.50% of 710 =
  20. 20.25% of 160 =
  21. 21.25% of 480 =
  22. 22.10% of 570 =
  23. 23.15% of 150 =
  24. 24.15% of 370 =
  25. 25.50% of 360 =
  26. 26.50% of 230 =
  27. 27.20% of 580 =
  28. 28.15% of 150 =
  29. 29.20% of 520 =
  30. 30.25% of 210 =
  31. 31.1% of 110 =
  32. 32.50% of 530 =
  33. 33.20% of 730 =
  34. 34.20% of 630 =
  35. 35.20% of 430 =
  36. 36.10% of 690 =
  37. 37.20% of 690 =
  38. 38.5% of 150 =
  39. 39.25% of 20 =
  40. 40.10% of 600 =

Answer key

  1. 76.5
  2. 10
  3. 1.2
  4. 12.5
  5. 156
  6. 5.3
  7. 79
  8. 140
  9. 12
  10. 19
  11. 46
  12. 142
  13. 3.7
  14. 94.5
  15. 217.5
  16. 116
  17. 34
  18. 36
  19. 355
  20. 40
  21. 120
  22. 57
  23. 22.5
  24. 55.5
  25. 180
  26. 115
  27. 116
  28. 22.5
  29. 104
  30. 52.5
  31. 1.1
  32. 265
  33. 146
  34. 126
  35. 86
  36. 69
  37. 138
  38. 7.5
  39. 5
  40. 60

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