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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 108 · 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. 1.25% of 690 =
  2. 2.10% of 580 =
  3. 3.10% of 260 =
  4. 4.25% of 350 =
  5. 5.10% of 170 =
  6. 6.20% of 560 =
  7. 7.5% of 480 =
  8. 8.50% of 250 =
  9. 9.1% of 240 =
  10. 10.10% of 160 =
  11. 11.25% of 860 =
  12. 12.5% of 710 =
  13. 13.20% of 790 =
  14. 14.5% of 750 =
  15. 15.5% of 520 =
  16. 16.1% of 290 =
  17. 17.5% of 480 =
  18. 18.1% of 220 =
  19. 19.15% of 870 =
  20. 20.5% of 600 =
  21. 21.20% of 700 =
  22. 22.15% of 560 =
  23. 23.10% of 190 =
  24. 24.15% of 60 =
  25. 25.10% of 740 =
  26. 26.50% of 470 =
  27. 27.5% of 540 =
  28. 28.20% of 850 =
  29. 29.10% of 540 =
  30. 30.5% of 510 =
  31. 31.1% of 520 =
  32. 32.50% of 280 =
  33. 33.1% of 810 =
  34. 34.15% of 100 =
  35. 35.20% of 530 =
  36. 36.20% of 60 =
  37. 37.50% of 880 =
  38. 38.25% of 250 =
  39. 39.1% of 290 =
  40. 40.20% of 680 =

Answer key

  1. 172.5
  2. 58
  3. 26
  4. 87.5
  5. 17
  6. 112
  7. 24
  8. 125
  9. 2.4
  10. 16
  11. 215
  12. 35.5
  13. 158
  14. 37.5
  15. 26
  16. 2.9
  17. 24
  18. 2.2
  19. 130.5
  20. 30
  21. 140
  22. 84
  23. 19
  24. 9
  25. 74
  26. 235
  27. 27
  28. 170
  29. 54
  30. 25.5
  31. 5.2
  32. 140
  33. 8.1
  34. 15
  35. 106
  36. 12
  37. 440
  38. 62.5
  39. 2.9
  40. 136

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