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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 158 · 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. 1.25% of 70 =
  2. 2.20% of 560 =
  3. 3.20% of 630 =
  4. 4.1% of 260 =
  5. 5.50% of 590 =
  6. 6.10% of 590 =
  7. 7.25% of 270 =
  8. 8.1% of 240 =
  9. 9.15% of 270 =
  10. 10.20% of 40 =
  11. 11.1% of 670 =
  12. 12.5% of 480 =
  13. 13.10% of 740 =
  14. 14.20% of 420 =
  15. 15.1% of 670 =
  16. 16.5% of 380 =
  17. 17.10% of 440 =
  18. 18.1% of 840 =
  19. 19.5% of 320 =
  20. 20.50% of 270 =
  21. 21.25% of 300 =
  22. 22.5% of 410 =
  23. 23.20% of 630 =
  24. 24.10% of 230 =
  25. 25.1% of 400 =
  26. 26.5% of 550 =
  27. 27.25% of 390 =
  28. 28.20% of 280 =
  29. 29.25% of 560 =
  30. 30.20% of 310 =
  31. 31.10% of 330 =
  32. 32.15% of 870 =
  33. 33.5% of 530 =
  34. 34.5% of 40 =
  35. 35.5% of 880 =
  36. 36.20% of 650 =
  37. 37.10% of 260 =
  38. 38.25% of 840 =
  39. 39.10% of 880 =
  40. 40.15% of 870 =

Answer key

  1. 17.5
  2. 112
  3. 126
  4. 2.6
  5. 295
  6. 59
  7. 67.5
  8. 2.4
  9. 40.5
  10. 8
  11. 6.7
  12. 24
  13. 74
  14. 84
  15. 6.7
  16. 19
  17. 44
  18. 8.4
  19. 16
  20. 135
  21. 75
  22. 20.5
  23. 126
  24. 23
  25. 4
  26. 27.5
  27. 97.5
  28. 56
  29. 140
  30. 62
  31. 33
  32. 130.5
  33. 26.5
  34. 2
  35. 44
  36. 130
  37. 26
  38. 210
  39. 88
  40. 130.5

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