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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 533 · 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 120 =
  2. 2.10% of 830 =
  3. 3.5% of 60 =
  4. 4.15% of 800 =
  5. 5.20% of 660 =
  6. 6.10% of 160 =
  7. 7.15% of 200 =
  8. 8.5% of 350 =
  9. 9.20% of 190 =
  10. 10.10% of 380 =
  11. 11.20% of 710 =
  12. 12.15% of 30 =
  13. 13.50% of 650 =
  14. 14.5% of 560 =
  15. 15.1% of 570 =
  16. 16.25% of 80 =
  17. 17.5% of 260 =
  18. 18.1% of 460 =
  19. 19.5% of 600 =
  20. 20.1% of 110 =
  21. 21.25% of 420 =
  22. 22.15% of 260 =
  23. 23.15% of 130 =
  24. 24.20% of 290 =
  25. 25.20% of 820 =
  26. 26.1% of 630 =
  27. 27.5% of 610 =
  28. 28.50% of 430 =
  29. 29.20% of 810 =
  30. 30.15% of 680 =
  31. 31.50% of 100 =
  32. 32.10% of 80 =
  33. 33.10% of 240 =
  34. 34.15% of 290 =
  35. 35.20% of 680 =
  36. 36.1% of 160 =
  37. 37.10% of 580 =
  38. 38.15% of 200 =
  39. 39.10% of 180 =
  40. 40.20% of 130 =

Answer key

  1. 12
  2. 83
  3. 3
  4. 120
  5. 132
  6. 16
  7. 30
  8. 17.5
  9. 38
  10. 38
  11. 142
  12. 4.5
  13. 325
  14. 28
  15. 5.7
  16. 20
  17. 13
  18. 4.6
  19. 30
  20. 1.1
  21. 105
  22. 39
  23. 19.5
  24. 58
  25. 164
  26. 6.3
  27. 30.5
  28. 215
  29. 162
  30. 102
  31. 50
  32. 8
  33. 24
  34. 43.5
  35. 136
  36. 1.6
  37. 58
  38. 30
  39. 18
  40. 26

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