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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 138 · 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 210 =
  2. 2.25% of 180 =
  3. 3.5% of 120 =
  4. 4.10% of 50 =
  5. 5.10% of 180 =
  6. 6.10% of 630 =
  7. 7.25% of 240 =
  8. 8.20% of 800 =
  9. 9.1% of 250 =
  10. 10.20% of 630 =
  11. 11.10% of 320 =
  12. 12.5% of 240 =
  13. 13.20% of 700 =
  14. 14.20% of 790 =
  15. 15.50% of 380 =
  16. 16.50% of 90 =
  17. 17.15% of 670 =
  18. 18.5% of 130 =
  19. 19.25% of 850 =
  20. 20.1% of 830 =
  21. 21.5% of 280 =
  22. 22.20% of 610 =
  23. 23.15% of 750 =
  24. 24.15% of 220 =
  25. 25.15% of 90 =
  26. 26.10% of 500 =
  27. 27.1% of 850 =
  28. 28.5% of 140 =
  29. 29.10% of 270 =
  30. 30.5% of 420 =
  31. 31.25% of 130 =
  32. 32.50% of 830 =
  33. 33.50% of 740 =
  34. 34.25% of 490 =
  35. 35.5% of 180 =
  36. 36.50% of 180 =
  37. 37.20% of 510 =
  38. 38.10% of 760 =
  39. 39.10% of 140 =
  40. 40.50% of 550 =

Answer key

  1. 10.5
  2. 45
  3. 6
  4. 5
  5. 18
  6. 63
  7. 60
  8. 160
  9. 2.5
  10. 126
  11. 32
  12. 12
  13. 140
  14. 158
  15. 190
  16. 45
  17. 100.5
  18. 6.5
  19. 212.5
  20. 8.3
  21. 14
  22. 122
  23. 112.5
  24. 33
  25. 13.5
  26. 50
  27. 8.5
  28. 7
  29. 27
  30. 21
  31. 32.5
  32. 415
  33. 370
  34. 122.5
  35. 9
  36. 90
  37. 102
  38. 76
  39. 14
  40. 275

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