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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 311 · 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. 1.5% of 430 =
  2. 2.50% of 740 =
  3. 3.1% of 720 =
  4. 4.15% of 350 =
  5. 5.1% of 720 =
  6. 6.50% of 370 =
  7. 7.15% of 700 =
  8. 8.10% of 650 =
  9. 9.5% of 110 =
  10. 10.20% of 30 =
  11. 11.10% of 460 =
  12. 12.15% of 550 =
  13. 13.10% of 450 =
  14. 14.25% of 820 =
  15. 15.25% of 880 =
  16. 16.1% of 660 =
  17. 17.1% of 200 =
  18. 18.1% of 390 =
  19. 19.25% of 780 =
  20. 20.5% of 410 =
  21. 21.5% of 750 =
  22. 22.5% of 290 =
  23. 23.5% of 580 =
  24. 24.10% of 270 =
  25. 25.10% of 100 =
  26. 26.10% of 580 =
  27. 27.15% of 180 =
  28. 28.1% of 690 =
  29. 29.5% of 350 =
  30. 30.50% of 190 =
  31. 31.10% of 420 =
  32. 32.50% of 250 =
  33. 33.15% of 520 =
  34. 34.15% of 830 =
  35. 35.10% of 230 =
  36. 36.5% of 170 =
  37. 37.50% of 740 =
  38. 38.1% of 160 =
  39. 39.25% of 810 =
  40. 40.50% of 120 =

Answer key

  1. 21.5
  2. 370
  3. 7.2
  4. 52.5
  5. 7.2
  6. 185
  7. 105
  8. 65
  9. 5.5
  10. 6
  11. 46
  12. 82.5
  13. 45
  14. 205
  15. 220
  16. 6.6
  17. 2
  18. 3.9
  19. 195
  20. 20.5
  21. 37.5
  22. 14.5
  23. 29
  24. 27
  25. 10
  26. 58
  27. 27
  28. 6.9
  29. 17.5
  30. 95
  31. 42
  32. 125
  33. 78
  34. 124.5
  35. 23
  36. 8.5
  37. 370
  38. 1.6
  39. 202.5
  40. 60

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