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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 521 · 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. 1.10% of 750 =
  2. 2.50% of 210 =
  3. 3.5% of 530 =
  4. 4.1% of 390 =
  5. 5.25% of 500 =
  6. 6.10% of 840 =
  7. 7.20% of 670 =
  8. 8.20% of 380 =
  9. 9.10% of 90 =
  10. 10.10% of 100 =
  11. 11.50% of 110 =
  12. 12.1% of 810 =
  13. 13.25% of 30 =
  14. 14.10% of 510 =
  15. 15.10% of 790 =
  16. 16.50% of 610 =
  17. 17.1% of 560 =
  18. 18.5% of 390 =
  19. 19.5% of 800 =
  20. 20.20% of 580 =
  21. 21.10% of 480 =
  22. 22.25% of 860 =
  23. 23.25% of 170 =
  24. 24.5% of 270 =
  25. 25.1% of 620 =
  26. 26.15% of 110 =
  27. 27.15% of 380 =
  28. 28.25% of 350 =
  29. 29.50% of 200 =
  30. 30.5% of 690 =
  31. 31.10% of 150 =
  32. 32.15% of 760 =
  33. 33.20% of 190 =
  34. 34.25% of 310 =
  35. 35.10% of 170 =
  36. 36.20% of 420 =
  37. 37.15% of 580 =
  38. 38.50% of 620 =
  39. 39.5% of 170 =
  40. 40.20% of 870 =

Answer key

  1. 75
  2. 105
  3. 26.5
  4. 3.9
  5. 125
  6. 84
  7. 134
  8. 76
  9. 9
  10. 10
  11. 55
  12. 8.1
  13. 7.5
  14. 51
  15. 79
  16. 305
  17. 5.6
  18. 19.5
  19. 40
  20. 116
  21. 48
  22. 215
  23. 42.5
  24. 13.5
  25. 6.2
  26. 16.5
  27. 57
  28. 87.5
  29. 100
  30. 34.5
  31. 15
  32. 114
  33. 38
  34. 77.5
  35. 17
  36. 84
  37. 87
  38. 310
  39. 8.5
  40. 174

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