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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 501 · 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. 1.20% of 270 =
  2. 2.25% of 180 =
  3. 3.25% of 570 =
  4. 4.5% of 220 =
  5. 5.5% of 640 =
  6. 6.50% of 90 =
  7. 7.25% of 270 =
  8. 8.15% of 40 =
  9. 9.10% of 820 =
  10. 10.5% of 750 =
  11. 11.5% of 340 =
  12. 12.1% of 880 =
  13. 13.10% of 670 =
  14. 14.20% of 170 =
  15. 15.10% of 680 =
  16. 16.25% of 320 =
  17. 17.15% of 530 =
  18. 18.5% of 220 =
  19. 19.25% of 390 =
  20. 20.10% of 530 =
  21. 21.50% of 240 =
  22. 22.10% of 860 =
  23. 23.10% of 650 =
  24. 24.25% of 850 =
  25. 25.1% of 480 =
  26. 26.50% of 810 =
  27. 27.15% of 710 =
  28. 28.5% of 160 =
  29. 29.1% of 100 =
  30. 30.5% of 210 =
  31. 31.1% of 320 =
  32. 32.10% of 380 =
  33. 33.10% of 550 =
  34. 34.10% of 280 =
  35. 35.10% of 900 =
  36. 36.15% of 300 =
  37. 37.10% of 100 =
  38. 38.5% of 450 =
  39. 39.10% of 260 =
  40. 40.50% of 50 =

Answer key

  1. 54
  2. 45
  3. 142.5
  4. 11
  5. 32
  6. 45
  7. 67.5
  8. 6
  9. 82
  10. 37.5
  11. 17
  12. 8.8
  13. 67
  14. 34
  15. 68
  16. 80
  17. 79.5
  18. 11
  19. 97.5
  20. 53
  21. 120
  22. 86
  23. 65
  24. 212.5
  25. 4.8
  26. 405
  27. 106.5
  28. 8
  29. 1
  30. 10.5
  31. 3.2
  32. 38
  33. 55
  34. 28
  35. 90
  36. 45
  37. 10
  38. 22.5
  39. 26
  40. 25

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