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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 504 · 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 20 =
  2. 2.5% of 870 =
  3. 3.1% of 130 =
  4. 4.50% of 630 =
  5. 5.1% of 50 =
  6. 6.15% of 550 =
  7. 7.50% of 370 =
  8. 8.10% of 410 =
  9. 9.20% of 440 =
  10. 10.20% of 740 =
  11. 11.50% of 720 =
  12. 12.1% of 260 =
  13. 13.20% of 100 =
  14. 14.5% of 610 =
  15. 15.50% of 100 =
  16. 16.50% of 850 =
  17. 17.50% of 370 =
  18. 18.5% of 150 =
  19. 19.10% of 410 =
  20. 20.10% of 860 =
  21. 21.10% of 400 =
  22. 22.25% of 380 =
  23. 23.5% of 470 =
  24. 24.50% of 480 =
  25. 25.5% of 850 =
  26. 26.20% of 40 =
  27. 27.50% of 210 =
  28. 28.10% of 840 =
  29. 29.10% of 620 =
  30. 30.50% of 60 =
  31. 31.20% of 380 =
  32. 32.20% of 600 =
  33. 33.50% of 210 =
  34. 34.15% of 450 =
  35. 35.5% of 140 =
  36. 36.1% of 320 =
  37. 37.1% of 250 =
  38. 38.50% of 780 =
  39. 39.1% of 760 =
  40. 40.25% of 650 =

Answer key

  1. 10
  2. 43.5
  3. 1.3
  4. 315
  5. 0.5
  6. 82.5
  7. 185
  8. 41
  9. 88
  10. 148
  11. 360
  12. 2.6
  13. 20
  14. 30.5
  15. 50
  16. 425
  17. 185
  18. 7.5
  19. 41
  20. 86
  21. 40
  22. 95
  23. 23.5
  24. 240
  25. 42.5
  26. 8
  27. 105
  28. 84
  29. 62
  30. 30
  31. 76
  32. 120
  33. 105
  34. 67.5
  35. 7
  36. 3.2
  37. 2.5
  38. 390
  39. 7.6
  40. 162.5

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