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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 9 · 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 190 =
  2. 2.25% of 550 =
  3. 3.10% of 670 =
  4. 4.10% of 100 =
  5. 5.25% of 640 =
  6. 6.1% of 790 =
  7. 7.10% of 570 =
  8. 8.20% of 110 =
  9. 9.20% of 100 =
  10. 10.25% of 210 =
  11. 11.15% of 270 =
  12. 12.1% of 530 =
  13. 13.20% of 120 =
  14. 14.20% of 240 =
  15. 15.20% of 630 =
  16. 16.25% of 740 =
  17. 17.5% of 550 =
  18. 18.15% of 890 =
  19. 19.50% of 360 =
  20. 20.5% of 900 =
  21. 21.50% of 360 =
  22. 22.50% of 450 =
  23. 23.50% of 460 =
  24. 24.50% of 530 =
  25. 25.25% of 60 =
  26. 26.50% of 170 =
  27. 27.50% of 850 =
  28. 28.5% of 130 =
  29. 29.15% of 220 =
  30. 30.10% of 820 =
  31. 31.25% of 570 =
  32. 32.1% of 170 =
  33. 33.20% of 100 =
  34. 34.15% of 690 =
  35. 35.25% of 770 =
  36. 36.1% of 580 =
  37. 37.25% of 500 =
  38. 38.10% of 630 =
  39. 39.20% of 830 =
  40. 40.50% of 420 =

Answer key

  1. 1.9
  2. 137.5
  3. 67
  4. 10
  5. 160
  6. 7.9
  7. 57
  8. 22
  9. 20
  10. 52.5
  11. 40.5
  12. 5.3
  13. 24
  14. 48
  15. 126
  16. 185
  17. 27.5
  18. 133.5
  19. 180
  20. 45
  21. 180
  22. 225
  23. 230
  24. 265
  25. 15
  26. 85
  27. 425
  28. 6.5
  29. 33
  30. 82
  31. 142.5
  32. 1.7
  33. 20
  34. 103.5
  35. 192.5
  36. 5.8
  37. 125
  38. 63
  39. 166
  40. 210

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