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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 467 · 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. 1.25% of 550 =
  2. 2.25% of 390 =
  3. 3.25% of 580 =
  4. 4.15% of 850 =
  5. 5.15% of 230 =
  6. 6.5% of 370 =
  7. 7.5% of 800 =
  8. 8.20% of 50 =
  9. 9.1% of 820 =
  10. 10.15% of 600 =
  11. 11.20% of 740 =
  12. 12.25% of 880 =
  13. 13.20% of 90 =
  14. 14.20% of 160 =
  15. 15.50% of 570 =
  16. 16.15% of 240 =
  17. 17.1% of 690 =
  18. 18.10% of 30 =
  19. 19.50% of 200 =
  20. 20.5% of 290 =
  21. 21.5% of 820 =
  22. 22.10% of 80 =
  23. 23.20% of 30 =
  24. 24.20% of 50 =
  25. 25.1% of 420 =
  26. 26.5% of 220 =
  27. 27.5% of 440 =
  28. 28.20% of 130 =
  29. 29.5% of 30 =
  30. 30.5% of 830 =
  31. 31.1% of 500 =
  32. 32.25% of 50 =
  33. 33.1% of 410 =
  34. 34.50% of 450 =
  35. 35.5% of 570 =
  36. 36.10% of 30 =
  37. 37.20% of 190 =
  38. 38.25% of 730 =
  39. 39.1% of 320 =
  40. 40.10% of 60 =

Answer key

  1. 137.5
  2. 97.5
  3. 145
  4. 127.5
  5. 34.5
  6. 18.5
  7. 40
  8. 10
  9. 8.2
  10. 90
  11. 148
  12. 220
  13. 18
  14. 32
  15. 285
  16. 36
  17. 6.9
  18. 3
  19. 100
  20. 14.5
  21. 41
  22. 8
  23. 6
  24. 10
  25. 4.2
  26. 11
  27. 22
  28. 26
  29. 1.5
  30. 41.5
  31. 5
  32. 12.5
  33. 4.1
  34. 225
  35. 28.5
  36. 3
  37. 38
  38. 182.5
  39. 3.2
  40. 6

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