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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 171 · 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. 1.5% of 370 =
  2. 2.15% of 270 =
  3. 3.10% of 900 =
  4. 4.10% of 620 =
  5. 5.5% of 740 =
  6. 6.25% of 240 =
  7. 7.50% of 890 =
  8. 8.50% of 350 =
  9. 9.5% of 220 =
  10. 10.50% of 450 =
  11. 11.10% of 540 =
  12. 12.20% of 510 =
  13. 13.10% of 900 =
  14. 14.20% of 650 =
  15. 15.10% of 240 =
  16. 16.20% of 730 =
  17. 17.1% of 670 =
  18. 18.50% of 250 =
  19. 19.1% of 740 =
  20. 20.50% of 620 =
  21. 21.20% of 790 =
  22. 22.20% of 490 =
  23. 23.5% of 430 =
  24. 24.1% of 150 =
  25. 25.50% of 630 =
  26. 26.1% of 450 =
  27. 27.50% of 830 =
  28. 28.25% of 350 =
  29. 29.5% of 30 =
  30. 30.5% of 450 =
  31. 31.20% of 530 =
  32. 32.20% of 550 =
  33. 33.50% of 570 =
  34. 34.50% of 210 =
  35. 35.1% of 90 =
  36. 36.10% of 390 =
  37. 37.5% of 690 =
  38. 38.1% of 440 =
  39. 39.15% of 880 =
  40. 40.1% of 790 =

Answer key

  1. 18.5
  2. 40.5
  3. 90
  4. 62
  5. 37
  6. 60
  7. 445
  8. 175
  9. 11
  10. 225
  11. 54
  12. 102
  13. 90
  14. 130
  15. 24
  16. 146
  17. 6.7
  18. 125
  19. 7.4
  20. 310
  21. 158
  22. 98
  23. 21.5
  24. 1.5
  25. 315
  26. 4.5
  27. 415
  28. 87.5
  29. 1.5
  30. 22.5
  31. 106
  32. 110
  33. 285
  34. 105
  35. 0.9
  36. 39
  37. 34.5
  38. 4.4
  39. 132
  40. 7.9

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