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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 378 · 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. 1.15% of 890 =
  2. 2.50% of 120 =
  3. 3.5% of 400 =
  4. 4.10% of 20 =
  5. 5.1% of 680 =
  6. 6.10% of 410 =
  7. 7.10% of 380 =
  8. 8.50% of 550 =
  9. 9.15% of 580 =
  10. 10.1% of 530 =
  11. 11.1% of 150 =
  12. 12.20% of 780 =
  13. 13.5% of 160 =
  14. 14.10% of 680 =
  15. 15.1% of 140 =
  16. 16.25% of 540 =
  17. 17.25% of 70 =
  18. 18.20% of 200 =
  19. 19.20% of 600 =
  20. 20.15% of 620 =
  21. 21.5% of 530 =
  22. 22.25% of 560 =
  23. 23.20% of 450 =
  24. 24.50% of 220 =
  25. 25.5% of 890 =
  26. 26.5% of 160 =
  27. 27.5% of 550 =
  28. 28.50% of 530 =
  29. 29.15% of 490 =
  30. 30.50% of 70 =
  31. 31.20% of 120 =
  32. 32.50% of 180 =
  33. 33.20% of 190 =
  34. 34.25% of 740 =
  35. 35.15% of 60 =
  36. 36.50% of 210 =
  37. 37.5% of 890 =
  38. 38.50% of 820 =
  39. 39.1% of 600 =
  40. 40.25% of 620 =

Answer key

  1. 133.5
  2. 60
  3. 20
  4. 2
  5. 6.8
  6. 41
  7. 38
  8. 275
  9. 87
  10. 5.3
  11. 1.5
  12. 156
  13. 8
  14. 68
  15. 1.4
  16. 135
  17. 17.5
  18. 40
  19. 120
  20. 93
  21. 26.5
  22. 140
  23. 90
  24. 110
  25. 44.5
  26. 8
  27. 27.5
  28. 265
  29. 73.5
  30. 35
  31. 24
  32. 90
  33. 38
  34. 185
  35. 9
  36. 105
  37. 44.5
  38. 410
  39. 6
  40. 155

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