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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 308 · 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 450 =
  2. 2.15% of 510 =
  3. 3.25% of 470 =
  4. 4.5% of 300 =
  5. 5.15% of 530 =
  6. 6.50% of 740 =
  7. 7.1% of 200 =
  8. 8.20% of 850 =
  9. 9.10% of 20 =
  10. 10.20% of 620 =
  11. 11.50% of 420 =
  12. 12.20% of 130 =
  13. 13.5% of 740 =
  14. 14.10% of 240 =
  15. 15.5% of 630 =
  16. 16.15% of 240 =
  17. 17.10% of 530 =
  18. 18.1% of 330 =
  19. 19.10% of 770 =
  20. 20.1% of 500 =
  21. 21.10% of 140 =
  22. 22.5% of 670 =
  23. 23.25% of 50 =
  24. 24.20% of 480 =
  25. 25.15% of 420 =
  26. 26.10% of 700 =
  27. 27.5% of 150 =
  28. 28.25% of 310 =
  29. 29.25% of 570 =
  30. 30.1% of 480 =
  31. 31.50% of 850 =
  32. 32.50% of 630 =
  33. 33.10% of 260 =
  34. 34.20% of 520 =
  35. 35.1% of 870 =
  36. 36.10% of 50 =
  37. 37.15% of 290 =
  38. 38.25% of 630 =
  39. 39.50% of 100 =
  40. 40.20% of 110 =

Answer key

  1. 225
  2. 76.5
  3. 117.5
  4. 15
  5. 79.5
  6. 370
  7. 2
  8. 170
  9. 2
  10. 124
  11. 210
  12. 26
  13. 37
  14. 24
  15. 31.5
  16. 36
  17. 53
  18. 3.3
  19. 77
  20. 5
  21. 14
  22. 33.5
  23. 12.5
  24. 96
  25. 63
  26. 70
  27. 7.5
  28. 77.5
  29. 142.5
  30. 4.8
  31. 425
  32. 315
  33. 26
  34. 104
  35. 8.7
  36. 5
  37. 43.5
  38. 157.5
  39. 50
  40. 22

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