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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 104 · 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 710 =
  2. 2.20% of 800 =
  3. 3.50% of 510 =
  4. 4.20% of 680 =
  5. 5.5% of 850 =
  6. 6.5% of 900 =
  7. 7.15% of 840 =
  8. 8.50% of 810 =
  9. 9.50% of 220 =
  10. 10.25% of 450 =
  11. 11.15% of 160 =
  12. 12.5% of 100 =
  13. 13.25% of 300 =
  14. 14.15% of 260 =
  15. 15.50% of 450 =
  16. 16.25% of 820 =
  17. 17.25% of 620 =
  18. 18.25% of 230 =
  19. 19.50% of 760 =
  20. 20.25% of 800 =
  21. 21.1% of 850 =
  22. 22.10% of 560 =
  23. 23.15% of 100 =
  24. 24.50% of 410 =
  25. 25.50% of 220 =
  26. 26.50% of 120 =
  27. 27.20% of 620 =
  28. 28.10% of 580 =
  29. 29.10% of 150 =
  30. 30.5% of 80 =
  31. 31.1% of 540 =
  32. 32.10% of 750 =
  33. 33.10% of 800 =
  34. 34.5% of 390 =
  35. 35.10% of 290 =
  36. 36.20% of 760 =
  37. 37.10% of 780 =
  38. 38.5% of 110 =
  39. 39.15% of 290 =
  40. 40.5% of 780 =

Answer key

  1. 7.1
  2. 160
  3. 255
  4. 136
  5. 42.5
  6. 45
  7. 126
  8. 405
  9. 110
  10. 112.5
  11. 24
  12. 5
  13. 75
  14. 39
  15. 225
  16. 205
  17. 155
  18. 57.5
  19. 380
  20. 200
  21. 8.5
  22. 56
  23. 15
  24. 205
  25. 110
  26. 60
  27. 124
  28. 58
  29. 15
  30. 4
  31. 5.4
  32. 75
  33. 80
  34. 19.5
  35. 29
  36. 152
  37. 78
  38. 5.5
  39. 43.5
  40. 39

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