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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 247 · 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. 1.20% of 470 =
  2. 2.1% of 890 =
  3. 3.15% of 580 =
  4. 4.20% of 70 =
  5. 5.5% of 90 =
  6. 6.5% of 900 =
  7. 7.50% of 230 =
  8. 8.20% of 340 =
  9. 9.1% of 810 =
  10. 10.50% of 330 =
  11. 11.10% of 20 =
  12. 12.20% of 410 =
  13. 13.15% of 790 =
  14. 14.15% of 650 =
  15. 15.20% of 30 =
  16. 16.50% of 370 =
  17. 17.15% of 790 =
  18. 18.20% of 50 =
  19. 19.10% of 100 =
  20. 20.25% of 240 =
  21. 21.15% of 400 =
  22. 22.5% of 270 =
  23. 23.50% of 880 =
  24. 24.15% of 500 =
  25. 25.50% of 620 =
  26. 26.5% of 210 =
  27. 27.5% of 650 =
  28. 28.15% of 280 =
  29. 29.20% of 750 =
  30. 30.50% of 850 =
  31. 31.10% of 100 =
  32. 32.50% of 130 =
  33. 33.50% of 690 =
  34. 34.25% of 460 =
  35. 35.25% of 780 =
  36. 36.25% of 270 =
  37. 37.50% of 550 =
  38. 38.5% of 700 =
  39. 39.25% of 110 =
  40. 40.15% of 870 =

Answer key

  1. 94
  2. 8.9
  3. 87
  4. 14
  5. 4.5
  6. 45
  7. 115
  8. 68
  9. 8.1
  10. 165
  11. 2
  12. 82
  13. 118.5
  14. 97.5
  15. 6
  16. 185
  17. 118.5
  18. 10
  19. 10
  20. 60
  21. 60
  22. 13.5
  23. 440
  24. 75
  25. 310
  26. 10.5
  27. 32.5
  28. 42
  29. 150
  30. 425
  31. 10
  32. 65
  33. 345
  34. 115
  35. 195
  36. 67.5
  37. 275
  38. 35
  39. 27.5
  40. 130.5

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