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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 304 · 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 140 =
  2. 2.20% of 730 =
  3. 3.50% of 320 =
  4. 4.1% of 330 =
  5. 5.10% of 790 =
  6. 6.25% of 380 =
  7. 7.25% of 330 =
  8. 8.20% of 520 =
  9. 9.1% of 390 =
  10. 10.5% of 630 =
  11. 11.15% of 70 =
  12. 12.5% of 200 =
  13. 13.50% of 540 =
  14. 14.25% of 30 =
  15. 15.1% of 700 =
  16. 16.15% of 370 =
  17. 17.25% of 210 =
  18. 18.20% of 200 =
  19. 19.50% of 190 =
  20. 20.20% of 70 =
  21. 21.5% of 840 =
  22. 22.20% of 520 =
  23. 23.5% of 620 =
  24. 24.5% of 20 =
  25. 25.20% of 670 =
  26. 26.50% of 610 =
  27. 27.1% of 620 =
  28. 28.50% of 450 =
  29. 29.10% of 500 =
  30. 30.5% of 320 =
  31. 31.5% of 800 =
  32. 32.5% of 370 =
  33. 33.50% of 220 =
  34. 34.50% of 860 =
  35. 35.20% of 110 =
  36. 36.15% of 170 =
  37. 37.5% of 800 =
  38. 38.10% of 530 =
  39. 39.50% of 250 =
  40. 40.20% of 440 =

Answer key

  1. 14
  2. 146
  3. 160
  4. 3.3
  5. 79
  6. 95
  7. 82.5
  8. 104
  9. 3.9
  10. 31.5
  11. 10.5
  12. 10
  13. 270
  14. 7.5
  15. 7
  16. 55.5
  17. 52.5
  18. 40
  19. 95
  20. 14
  21. 42
  22. 104
  23. 31
  24. 1
  25. 134
  26. 305
  27. 6.2
  28. 225
  29. 50
  30. 16
  31. 40
  32. 18.5
  33. 110
  34. 430
  35. 22
  36. 25.5
  37. 40
  38. 53
  39. 125
  40. 88

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