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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 47 · 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 310 =
  2. 2.10% of 710 =
  3. 3.1% of 60 =
  4. 4.20% of 460 =
  5. 5.25% of 810 =
  6. 6.50% of 500 =
  7. 7.25% of 350 =
  8. 8.25% of 400 =
  9. 9.25% of 220 =
  10. 10.20% of 840 =
  11. 11.20% of 40 =
  12. 12.15% of 700 =
  13. 13.5% of 50 =
  14. 14.15% of 70 =
  15. 15.10% of 290 =
  16. 16.15% of 200 =
  17. 17.20% of 610 =
  18. 18.20% of 190 =
  19. 19.1% of 700 =
  20. 20.50% of 90 =
  21. 21.50% of 640 =
  22. 22.1% of 80 =
  23. 23.15% of 480 =
  24. 24.10% of 420 =
  25. 25.50% of 110 =
  26. 26.25% of 740 =
  27. 27.5% of 400 =
  28. 28.10% of 140 =
  29. 29.5% of 640 =
  30. 30.15% of 70 =
  31. 31.5% of 630 =
  32. 32.50% of 780 =
  33. 33.5% of 170 =
  34. 34.20% of 170 =
  35. 35.50% of 600 =
  36. 36.15% of 820 =
  37. 37.1% of 710 =
  38. 38.25% of 500 =
  39. 39.50% of 360 =
  40. 40.25% of 750 =

Answer key

  1. 31
  2. 71
  3. 0.6
  4. 92
  5. 202.5
  6. 250
  7. 87.5
  8. 100
  9. 55
  10. 168
  11. 8
  12. 105
  13. 2.5
  14. 10.5
  15. 29
  16. 30
  17. 122
  18. 38
  19. 7
  20. 45
  21. 320
  22. 0.8
  23. 72
  24. 42
  25. 55
  26. 185
  27. 20
  28. 14
  29. 32
  30. 10.5
  31. 31.5
  32. 390
  33. 8.5
  34. 34
  35. 300
  36. 123
  37. 7.1
  38. 125
  39. 180
  40. 187.5

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