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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 392 · 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. 1.1% of 20 =
  2. 2.1% of 60 =
  3. 3.5% of 160 =
  4. 4.10% of 70 =
  5. 5.15% of 840 =
  6. 6.25% of 900 =
  7. 7.1% of 630 =
  8. 8.10% of 830 =
  9. 9.15% of 440 =
  10. 10.20% of 510 =
  11. 11.5% of 180 =
  12. 12.5% of 830 =
  13. 13.20% of 280 =
  14. 14.5% of 430 =
  15. 15.25% of 700 =
  16. 16.5% of 200 =
  17. 17.20% of 560 =
  18. 18.10% of 190 =
  19. 19.10% of 260 =
  20. 20.50% of 680 =
  21. 21.50% of 290 =
  22. 22.5% of 250 =
  23. 23.15% of 660 =
  24. 24.5% of 480 =
  25. 25.10% of 860 =
  26. 26.50% of 460 =
  27. 27.20% of 460 =
  28. 28.20% of 270 =
  29. 29.10% of 300 =
  30. 30.5% of 170 =
  31. 31.5% of 650 =
  32. 32.10% of 140 =
  33. 33.50% of 760 =
  34. 34.50% of 550 =
  35. 35.10% of 430 =
  36. 36.10% of 600 =
  37. 37.10% of 290 =
  38. 38.10% of 170 =
  39. 39.50% of 150 =
  40. 40.1% of 250 =

Answer key

  1. 0.2
  2. 0.6
  3. 8
  4. 7
  5. 126
  6. 225
  7. 6.3
  8. 83
  9. 66
  10. 102
  11. 9
  12. 41.5
  13. 56
  14. 21.5
  15. 175
  16. 10
  17. 112
  18. 19
  19. 26
  20. 340
  21. 145
  22. 12.5
  23. 99
  24. 24
  25. 86
  26. 230
  27. 92
  28. 54
  29. 30
  30. 8.5
  31. 32.5
  32. 14
  33. 380
  34. 275
  35. 43
  36. 60
  37. 29
  38. 17
  39. 75
  40. 2.5

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