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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 470 · 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 180 =
  2. 2.25% of 630 =
  3. 3.50% of 130 =
  4. 4.5% of 850 =
  5. 5.25% of 340 =
  6. 6.15% of 280 =
  7. 7.1% of 70 =
  8. 8.20% of 380 =
  9. 9.5% of 30 =
  10. 10.15% of 20 =
  11. 11.5% of 370 =
  12. 12.20% of 20 =
  13. 13.5% of 130 =
  14. 14.1% of 230 =
  15. 15.10% of 100 =
  16. 16.15% of 340 =
  17. 17.10% of 520 =
  18. 18.10% of 350 =
  19. 19.5% of 620 =
  20. 20.1% of 420 =
  21. 21.20% of 900 =
  22. 22.15% of 640 =
  23. 23.5% of 290 =
  24. 24.50% of 70 =
  25. 25.20% of 30 =
  26. 26.10% of 420 =
  27. 27.25% of 200 =
  28. 28.50% of 180 =
  29. 29.50% of 610 =
  30. 30.20% of 180 =
  31. 31.10% of 640 =
  32. 32.20% of 210 =
  33. 33.10% of 470 =
  34. 34.20% of 330 =
  35. 35.50% of 760 =
  36. 36.10% of 200 =
  37. 37.10% of 210 =
  38. 38.15% of 620 =
  39. 39.1% of 160 =
  40. 40.5% of 90 =

Answer key

  1. 9
  2. 157.5
  3. 65
  4. 42.5
  5. 85
  6. 42
  7. 0.7
  8. 76
  9. 1.5
  10. 3
  11. 18.5
  12. 4
  13. 6.5
  14. 2.3
  15. 10
  16. 51
  17. 52
  18. 35
  19. 31
  20. 4.2
  21. 180
  22. 96
  23. 14.5
  24. 35
  25. 6
  26. 42
  27. 50
  28. 90
  29. 305
  30. 36
  31. 64
  32. 42
  33. 47
  34. 66
  35. 380
  36. 20
  37. 21
  38. 93
  39. 1.6
  40. 4.5

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