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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 667 · 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 600 =
  2. 2.25% of 340 =
  3. 3.50% of 750 =
  4. 4.20% of 690 =
  5. 5.50% of 30 =
  6. 6.10% of 200 =
  7. 7.50% of 670 =
  8. 8.10% of 490 =
  9. 9.20% of 120 =
  10. 10.15% of 20 =
  11. 11.5% of 550 =
  12. 12.50% of 300 =
  13. 13.1% of 20 =
  14. 14.5% of 500 =
  15. 15.10% of 900 =
  16. 16.20% of 240 =
  17. 17.5% of 380 =
  18. 18.5% of 420 =
  19. 19.50% of 250 =
  20. 20.1% of 620 =
  21. 21.25% of 210 =
  22. 22.20% of 760 =
  23. 23.25% of 790 =
  24. 24.20% of 250 =
  25. 25.15% of 300 =
  26. 26.50% of 450 =
  27. 27.15% of 330 =
  28. 28.50% of 400 =
  29. 29.50% of 660 =
  30. 30.5% of 120 =
  31. 31.10% of 250 =
  32. 32.10% of 420 =
  33. 33.25% of 120 =
  34. 34.5% of 170 =
  35. 35.15% of 220 =
  36. 36.1% of 410 =
  37. 37.10% of 210 =
  38. 38.5% of 830 =
  39. 39.5% of 470 =
  40. 40.10% of 100 =

Answer key

  1. 60
  2. 85
  3. 375
  4. 138
  5. 15
  6. 20
  7. 335
  8. 49
  9. 24
  10. 3
  11. 27.5
  12. 150
  13. 0.2
  14. 25
  15. 90
  16. 48
  17. 19
  18. 21
  19. 125
  20. 6.2
  21. 52.5
  22. 152
  23. 197.5
  24. 50
  25. 45
  26. 225
  27. 49.5
  28. 200
  29. 330
  30. 6
  31. 25
  32. 42
  33. 30
  34. 8.5
  35. 33
  36. 4.1
  37. 21
  38. 41.5
  39. 23.5
  40. 10

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