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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 610 · 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 680 =
  2. 2.20% of 640 =
  3. 3.50% of 300 =
  4. 4.10% of 30 =
  5. 5.15% of 400 =
  6. 6.1% of 640 =
  7. 7.10% of 290 =
  8. 8.10% of 370 =
  9. 9.5% of 370 =
  10. 10.10% of 20 =
  11. 11.1% of 620 =
  12. 12.1% of 600 =
  13. 13.50% of 130 =
  14. 14.10% of 520 =
  15. 15.1% of 160 =
  16. 16.5% of 220 =
  17. 17.10% of 190 =
  18. 18.1% of 890 =
  19. 19.1% of 90 =
  20. 20.15% of 730 =
  21. 21.5% of 840 =
  22. 22.5% of 850 =
  23. 23.1% of 260 =
  24. 24.10% of 410 =
  25. 25.10% of 560 =
  26. 26.1% of 650 =
  27. 27.20% of 580 =
  28. 28.20% of 130 =
  29. 29.25% of 420 =
  30. 30.1% of 220 =
  31. 31.50% of 800 =
  32. 32.25% of 250 =
  33. 33.15% of 780 =
  34. 34.20% of 170 =
  35. 35.20% of 200 =
  36. 36.1% of 360 =
  37. 37.10% of 780 =
  38. 38.5% of 900 =
  39. 39.1% of 210 =
  40. 40.25% of 520 =

Answer key

  1. 170
  2. 128
  3. 150
  4. 3
  5. 60
  6. 6.4
  7. 29
  8. 37
  9. 18.5
  10. 2
  11. 6.2
  12. 6
  13. 65
  14. 52
  15. 1.6
  16. 11
  17. 19
  18. 8.9
  19. 0.9
  20. 109.5
  21. 42
  22. 42.5
  23. 2.6
  24. 41
  25. 56
  26. 6.5
  27. 116
  28. 26
  29. 105
  30. 2.2
  31. 400
  32. 62.5
  33. 117
  34. 34
  35. 40
  36. 3.6
  37. 78
  38. 45
  39. 2.1
  40. 130

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