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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 630 · 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. 1.1% of 870 =
  2. 2.10% of 840 =
  3. 3.20% of 410 =
  4. 4.15% of 180 =
  5. 5.15% of 30 =
  6. 6.1% of 300 =
  7. 7.25% of 830 =
  8. 8.15% of 800 =
  9. 9.1% of 130 =
  10. 10.1% of 810 =
  11. 11.25% of 220 =
  12. 12.10% of 860 =
  13. 13.10% of 250 =
  14. 14.10% of 390 =
  15. 15.20% of 370 =
  16. 16.10% of 580 =
  17. 17.5% of 20 =
  18. 18.50% of 220 =
  19. 19.10% of 460 =
  20. 20.5% of 810 =
  21. 21.5% of 540 =
  22. 22.10% of 260 =
  23. 23.50% of 750 =
  24. 24.15% of 610 =
  25. 25.10% of 450 =
  26. 26.10% of 720 =
  27. 27.20% of 370 =
  28. 28.15% of 440 =
  29. 29.20% of 800 =
  30. 30.5% of 320 =
  31. 31.50% of 250 =
  32. 32.25% of 250 =
  33. 33.10% of 570 =
  34. 34.50% of 210 =
  35. 35.1% of 860 =
  36. 36.20% of 540 =
  37. 37.25% of 150 =
  38. 38.5% of 80 =
  39. 39.10% of 370 =
  40. 40.20% of 700 =

Answer key

  1. 8.7
  2. 84
  3. 82
  4. 27
  5. 4.5
  6. 3
  7. 207.5
  8. 120
  9. 1.3
  10. 8.1
  11. 55
  12. 86
  13. 25
  14. 39
  15. 74
  16. 58
  17. 1
  18. 110
  19. 46
  20. 40.5
  21. 27
  22. 26
  23. 375
  24. 91.5
  25. 45
  26. 72
  27. 74
  28. 66
  29. 160
  30. 16
  31. 125
  32. 62.5
  33. 57
  34. 105
  35. 8.6
  36. 108
  37. 37.5
  38. 4
  39. 37
  40. 140

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