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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 103 · 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 820 =
  2. 2.10% of 160 =
  3. 3.50% of 340 =
  4. 4.50% of 80 =
  5. 5.50% of 650 =
  6. 6.1% of 80 =
  7. 7.1% of 320 =
  8. 8.20% of 500 =
  9. 9.10% of 730 =
  10. 10.1% of 720 =
  11. 11.15% of 290 =
  12. 12.25% of 730 =
  13. 13.1% of 290 =
  14. 14.1% of 850 =
  15. 15.25% of 320 =
  16. 16.1% of 790 =
  17. 17.5% of 330 =
  18. 18.15% of 270 =
  19. 19.25% of 470 =
  20. 20.25% of 840 =
  21. 21.25% of 400 =
  22. 22.25% of 760 =
  23. 23.50% of 360 =
  24. 24.5% of 440 =
  25. 25.10% of 700 =
  26. 26.50% of 60 =
  27. 27.20% of 780 =
  28. 28.20% of 620 =
  29. 29.25% of 410 =
  30. 30.10% of 750 =
  31. 31.50% of 260 =
  32. 32.5% of 760 =
  33. 33.1% of 50 =
  34. 34.1% of 310 =
  35. 35.20% of 70 =
  36. 36.25% of 250 =
  37. 37.1% of 680 =
  38. 38.5% of 70 =
  39. 39.15% of 830 =
  40. 40.1% of 520 =

Answer key

  1. 410
  2. 16
  3. 170
  4. 40
  5. 325
  6. 0.8
  7. 3.2
  8. 100
  9. 73
  10. 7.2
  11. 43.5
  12. 182.5
  13. 2.9
  14. 8.5
  15. 80
  16. 7.9
  17. 16.5
  18. 40.5
  19. 117.5
  20. 210
  21. 100
  22. 190
  23. 180
  24. 22
  25. 70
  26. 30
  27. 156
  28. 124
  29. 102.5
  30. 75
  31. 130
  32. 38
  33. 0.5
  34. 3.1
  35. 14
  36. 62.5
  37. 6.8
  38. 3.5
  39. 124.5
  40. 5.2

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