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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 212 · 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. 1.10% of 770 =
  2. 2.5% of 760 =
  3. 3.25% of 430 =
  4. 4.25% of 890 =
  5. 5.20% of 320 =
  6. 6.1% of 230 =
  7. 7.50% of 320 =
  8. 8.25% of 820 =
  9. 9.1% of 720 =
  10. 10.15% of 280 =
  11. 11.15% of 690 =
  12. 12.25% of 110 =
  13. 13.10% of 170 =
  14. 14.1% of 640 =
  15. 15.15% of 750 =
  16. 16.15% of 40 =
  17. 17.25% of 120 =
  18. 18.50% of 540 =
  19. 19.5% of 220 =
  20. 20.1% of 170 =
  21. 21.25% of 340 =
  22. 22.25% of 580 =
  23. 23.25% of 480 =
  24. 24.1% of 270 =
  25. 25.50% of 470 =
  26. 26.25% of 590 =
  27. 27.15% of 710 =
  28. 28.10% of 610 =
  29. 29.5% of 570 =
  30. 30.50% of 550 =
  31. 31.15% of 140 =
  32. 32.20% of 610 =
  33. 33.10% of 340 =
  34. 34.50% of 270 =
  35. 35.20% of 240 =
  36. 36.5% of 420 =
  37. 37.25% of 730 =
  38. 38.15% of 80 =
  39. 39.5% of 800 =
  40. 40.5% of 110 =

Answer key

  1. 77
  2. 38
  3. 107.5
  4. 222.5
  5. 64
  6. 2.3
  7. 160
  8. 205
  9. 7.2
  10. 42
  11. 103.5
  12. 27.5
  13. 17
  14. 6.4
  15. 112.5
  16. 6
  17. 30
  18. 270
  19. 11
  20. 1.7
  21. 85
  22. 145
  23. 120
  24. 2.7
  25. 235
  26. 147.5
  27. 106.5
  28. 61
  29. 28.5
  30. 275
  31. 21
  32. 122
  33. 34
  34. 135
  35. 48
  36. 21
  37. 182.5
  38. 12
  39. 40
  40. 5.5

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