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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 129 · 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 560 =
  2. 2.10% of 140 =
  3. 3.10% of 50 =
  4. 4.20% of 270 =
  5. 5.1% of 290 =
  6. 6.5% of 500 =
  7. 7.1% of 590 =
  8. 8.10% of 500 =
  9. 9.50% of 160 =
  10. 10.20% of 410 =
  11. 11.10% of 300 =
  12. 12.1% of 550 =
  13. 13.5% of 400 =
  14. 14.5% of 490 =
  15. 15.25% of 380 =
  16. 16.25% of 890 =
  17. 17.5% of 660 =
  18. 18.10% of 170 =
  19. 19.25% of 670 =
  20. 20.15% of 600 =
  21. 21.10% of 750 =
  22. 22.25% of 740 =
  23. 23.25% of 240 =
  24. 24.1% of 460 =
  25. 25.5% of 860 =
  26. 26.50% of 90 =
  27. 27.5% of 60 =
  28. 28.50% of 380 =
  29. 29.1% of 140 =
  30. 30.50% of 740 =
  31. 31.10% of 190 =
  32. 32.1% of 250 =
  33. 33.50% of 780 =
  34. 34.10% of 130 =
  35. 35.20% of 720 =
  36. 36.20% of 580 =
  37. 37.15% of 510 =
  38. 38.20% of 780 =
  39. 39.10% of 150 =
  40. 40.10% of 210 =

Answer key

  1. 280
  2. 14
  3. 5
  4. 54
  5. 2.9
  6. 25
  7. 5.9
  8. 50
  9. 80
  10. 82
  11. 30
  12. 5.5
  13. 20
  14. 24.5
  15. 95
  16. 222.5
  17. 33
  18. 17
  19. 167.5
  20. 90
  21. 75
  22. 185
  23. 60
  24. 4.6
  25. 43
  26. 45
  27. 3
  28. 190
  29. 1.4
  30. 370
  31. 19
  32. 2.5
  33. 390
  34. 13
  35. 144
  36. 116
  37. 76.5
  38. 156
  39. 15
  40. 21

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