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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 23 · 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 720 =
  2. 2.5% of 820 =
  3. 3.1% of 700 =
  4. 4.10% of 820 =
  5. 5.1% of 180 =
  6. 6.5% of 70 =
  7. 7.25% of 620 =
  8. 8.20% of 140 =
  9. 9.1% of 160 =
  10. 10.10% of 480 =
  11. 11.15% of 220 =
  12. 12.20% of 300 =
  13. 13.1% of 700 =
  14. 14.25% of 370 =
  15. 15.15% of 90 =
  16. 16.25% of 240 =
  17. 17.20% of 630 =
  18. 18.25% of 120 =
  19. 19.1% of 710 =
  20. 20.5% of 650 =
  21. 21.1% of 120 =
  22. 22.20% of 640 =
  23. 23.10% of 830 =
  24. 24.5% of 380 =
  25. 25.20% of 180 =
  26. 26.5% of 420 =
  27. 27.25% of 880 =
  28. 28.15% of 100 =
  29. 29.10% of 600 =
  30. 30.1% of 60 =
  31. 31.15% of 800 =
  32. 32.15% of 810 =
  33. 33.1% of 110 =
  34. 34.5% of 100 =
  35. 35.25% of 860 =
  36. 36.25% of 230 =
  37. 37.25% of 760 =
  38. 38.5% of 390 =
  39. 39.5% of 880 =
  40. 40.15% of 150 =

Answer key

  1. 108
  2. 41
  3. 7
  4. 82
  5. 1.8
  6. 3.5
  7. 155
  8. 28
  9. 1.6
  10. 48
  11. 33
  12. 60
  13. 7
  14. 92.5
  15. 13.5
  16. 60
  17. 126
  18. 30
  19. 7.1
  20. 32.5
  21. 1.2
  22. 128
  23. 83
  24. 19
  25. 36
  26. 21
  27. 220
  28. 15
  29. 60
  30. 0.6
  31. 120
  32. 121.5
  33. 1.1
  34. 5
  35. 215
  36. 57.5
  37. 190
  38. 19.5
  39. 44
  40. 22.5

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