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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 273 · 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 680 =
  2. 2.5% of 780 =
  3. 3.15% of 470 =
  4. 4.5% of 210 =
  5. 5.50% of 800 =
  6. 6.10% of 790 =
  7. 7.10% of 240 =
  8. 8.5% of 210 =
  9. 9.5% of 850 =
  10. 10.25% of 570 =
  11. 11.5% of 880 =
  12. 12.15% of 480 =
  13. 13.1% of 820 =
  14. 14.10% of 220 =
  15. 15.10% of 190 =
  16. 16.5% of 790 =
  17. 17.50% of 110 =
  18. 18.10% of 740 =
  19. 19.1% of 740 =
  20. 20.5% of 100 =
  21. 21.20% of 20 =
  22. 22.50% of 80 =
  23. 23.20% of 190 =
  24. 24.10% of 740 =
  25. 25.15% of 820 =
  26. 26.5% of 370 =
  27. 27.20% of 150 =
  28. 28.20% of 900 =
  29. 29.25% of 710 =
  30. 30.10% of 110 =
  31. 31.20% of 630 =
  32. 32.50% of 460 =
  33. 33.25% of 900 =
  34. 34.25% of 70 =
  35. 35.15% of 600 =
  36. 36.15% of 840 =
  37. 37.20% of 220 =
  38. 38.10% of 700 =
  39. 39.50% of 260 =
  40. 40.25% of 870 =

Answer key

  1. 340
  2. 39
  3. 70.5
  4. 10.5
  5. 400
  6. 79
  7. 24
  8. 10.5
  9. 42.5
  10. 142.5
  11. 44
  12. 72
  13. 8.2
  14. 22
  15. 19
  16. 39.5
  17. 55
  18. 74
  19. 7.4
  20. 5
  21. 4
  22. 40
  23. 38
  24. 74
  25. 123
  26. 18.5
  27. 30
  28. 180
  29. 177.5
  30. 11
  31. 126
  32. 230
  33. 225
  34. 17.5
  35. 90
  36. 126
  37. 44
  38. 70
  39. 130
  40. 217.5

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