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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 632 · 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. 1.50% of 310 =
  2. 2.10% of 610 =
  3. 3.50% of 590 =
  4. 4.10% of 30 =
  5. 5.15% of 450 =
  6. 6.5% of 870 =
  7. 7.1% of 190 =
  8. 8.50% of 290 =
  9. 9.50% of 610 =
  10. 10.20% of 390 =
  11. 11.5% of 180 =
  12. 12.5% of 240 =
  13. 13.50% of 500 =
  14. 14.25% of 260 =
  15. 15.5% of 460 =
  16. 16.50% of 890 =
  17. 17.5% of 110 =
  18. 18.1% of 80 =
  19. 19.15% of 120 =
  20. 20.25% of 150 =
  21. 21.10% of 680 =
  22. 22.20% of 450 =
  23. 23.10% of 210 =
  24. 24.25% of 80 =
  25. 25.15% of 600 =
  26. 26.15% of 780 =
  27. 27.10% of 320 =
  28. 28.5% of 210 =
  29. 29.25% of 20 =
  30. 30.10% of 770 =
  31. 31.10% of 400 =
  32. 32.5% of 900 =
  33. 33.10% of 600 =
  34. 34.5% of 150 =
  35. 35.5% of 220 =
  36. 36.15% of 20 =
  37. 37.25% of 190 =
  38. 38.5% of 760 =
  39. 39.25% of 390 =
  40. 40.1% of 770 =

Answer key

  1. 155
  2. 61
  3. 295
  4. 3
  5. 67.5
  6. 43.5
  7. 1.9
  8. 145
  9. 305
  10. 78
  11. 9
  12. 12
  13. 250
  14. 65
  15. 23
  16. 445
  17. 5.5
  18. 0.8
  19. 18
  20. 37.5
  21. 68
  22. 90
  23. 21
  24. 20
  25. 90
  26. 117
  27. 32
  28. 10.5
  29. 5
  30. 77
  31. 40
  32. 45
  33. 60
  34. 7.5
  35. 11
  36. 3
  37. 47.5
  38. 38
  39. 97.5
  40. 7.7

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