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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 405 · 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. 1.20% of 470 =
  2. 2.15% of 140 =
  3. 3.20% of 240 =
  4. 4.10% of 650 =
  5. 5.15% of 190 =
  6. 6.5% of 600 =
  7. 7.1% of 150 =
  8. 8.5% of 420 =
  9. 9.1% of 90 =
  10. 10.5% of 120 =
  11. 11.15% of 370 =
  12. 12.5% of 840 =
  13. 13.50% of 20 =
  14. 14.50% of 280 =
  15. 15.15% of 550 =
  16. 16.1% of 570 =
  17. 17.15% of 240 =
  18. 18.10% of 50 =
  19. 19.25% of 870 =
  20. 20.15% of 170 =
  21. 21.25% of 340 =
  22. 22.20% of 20 =
  23. 23.15% of 360 =
  24. 24.25% of 690 =
  25. 25.50% of 230 =
  26. 26.10% of 220 =
  27. 27.20% of 620 =
  28. 28.25% of 650 =
  29. 29.25% of 610 =
  30. 30.5% of 290 =
  31. 31.1% of 690 =
  32. 32.25% of 310 =
  33. 33.10% of 580 =
  34. 34.20% of 30 =
  35. 35.10% of 330 =
  36. 36.50% of 170 =
  37. 37.20% of 340 =
  38. 38.25% of 410 =
  39. 39.15% of 610 =
  40. 40.25% of 710 =

Answer key

  1. 94
  2. 21
  3. 48
  4. 65
  5. 28.5
  6. 30
  7. 1.5
  8. 21
  9. 0.9
  10. 6
  11. 55.5
  12. 42
  13. 10
  14. 140
  15. 82.5
  16. 5.7
  17. 36
  18. 5
  19. 217.5
  20. 25.5
  21. 85
  22. 4
  23. 54
  24. 172.5
  25. 115
  26. 22
  27. 124
  28. 162.5
  29. 152.5
  30. 14.5
  31. 6.9
  32. 77.5
  33. 58
  34. 6
  35. 33
  36. 85
  37. 68
  38. 102.5
  39. 91.5
  40. 177.5

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