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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 154 · 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 230 =
  2. 2.15% of 780 =
  3. 3.5% of 50 =
  4. 4.50% of 230 =
  5. 5.10% of 570 =
  6. 6.5% of 90 =
  7. 7.15% of 260 =
  8. 8.1% of 280 =
  9. 9.50% of 380 =
  10. 10.25% of 90 =
  11. 11.10% of 850 =
  12. 12.5% of 440 =
  13. 13.50% of 360 =
  14. 14.5% of 590 =
  15. 15.20% of 400 =
  16. 16.10% of 270 =
  17. 17.20% of 260 =
  18. 18.5% of 500 =
  19. 19.20% of 650 =
  20. 20.15% of 320 =
  21. 21.15% of 220 =
  22. 22.25% of 560 =
  23. 23.15% of 300 =
  24. 24.1% of 660 =
  25. 25.5% of 630 =
  26. 26.50% of 880 =
  27. 27.5% of 310 =
  28. 28.20% of 400 =
  29. 29.15% of 500 =
  30. 30.50% of 570 =
  31. 31.15% of 380 =
  32. 32.50% of 100 =
  33. 33.50% of 750 =
  34. 34.1% of 310 =
  35. 35.10% of 120 =
  36. 36.25% of 510 =
  37. 37.50% of 120 =
  38. 38.50% of 40 =
  39. 39.1% of 900 =
  40. 40.10% of 450 =

Answer key

  1. 23
  2. 117
  3. 2.5
  4. 115
  5. 57
  6. 4.5
  7. 39
  8. 2.8
  9. 190
  10. 22.5
  11. 85
  12. 22
  13. 180
  14. 29.5
  15. 80
  16. 27
  17. 52
  18. 25
  19. 130
  20. 48
  21. 33
  22. 140
  23. 45
  24. 6.6
  25. 31.5
  26. 440
  27. 15.5
  28. 80
  29. 75
  30. 285
  31. 57
  32. 50
  33. 375
  34. 3.1
  35. 12
  36. 127.5
  37. 60
  38. 20
  39. 9
  40. 45

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