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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 316 · 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. 1.15% of 880 =
  2. 2.20% of 780 =
  3. 3.5% of 880 =
  4. 4.15% of 790 =
  5. 5.20% of 20 =
  6. 6.20% of 240 =
  7. 7.20% of 500 =
  8. 8.20% of 160 =
  9. 9.1% of 400 =
  10. 10.1% of 770 =
  11. 11.15% of 690 =
  12. 12.25% of 800 =
  13. 13.25% of 750 =
  14. 14.10% of 330 =
  15. 15.50% of 220 =
  16. 16.10% of 290 =
  17. 17.5% of 130 =
  18. 18.15% of 510 =
  19. 19.50% of 360 =
  20. 20.15% of 250 =
  21. 21.1% of 190 =
  22. 22.10% of 110 =
  23. 23.5% of 530 =
  24. 24.10% of 700 =
  25. 25.50% of 570 =
  26. 26.1% of 160 =
  27. 27.1% of 780 =
  28. 28.5% of 20 =
  29. 29.25% of 450 =
  30. 30.5% of 290 =
  31. 31.50% of 320 =
  32. 32.50% of 490 =
  33. 33.10% of 40 =
  34. 34.1% of 590 =
  35. 35.25% of 580 =
  36. 36.10% of 670 =
  37. 37.15% of 680 =
  38. 38.10% of 170 =
  39. 39.15% of 440 =
  40. 40.20% of 270 =

Answer key

  1. 132
  2. 156
  3. 44
  4. 118.5
  5. 4
  6. 48
  7. 100
  8. 32
  9. 4
  10. 7.7
  11. 103.5
  12. 200
  13. 187.5
  14. 33
  15. 110
  16. 29
  17. 6.5
  18. 76.5
  19. 180
  20. 37.5
  21. 1.9
  22. 11
  23. 26.5
  24. 70
  25. 285
  26. 1.6
  27. 7.8
  28. 1
  29. 112.5
  30. 14.5
  31. 160
  32. 245
  33. 4
  34. 5.9
  35. 145
  36. 67
  37. 102
  38. 17
  39. 66
  40. 54

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