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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 684 · 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 80 =
  2. 2.5% of 720 =
  3. 3.1% of 880 =
  4. 4.10% of 310 =
  5. 5.20% of 670 =
  6. 6.5% of 740 =
  7. 7.50% of 320 =
  8. 8.20% of 630 =
  9. 9.5% of 330 =
  10. 10.20% of 770 =
  11. 11.10% of 460 =
  12. 12.5% of 550 =
  13. 13.20% of 250 =
  14. 14.10% of 550 =
  15. 15.5% of 610 =
  16. 16.25% of 30 =
  17. 17.5% of 850 =
  18. 18.5% of 70 =
  19. 19.5% of 220 =
  20. 20.10% of 410 =
  21. 21.50% of 100 =
  22. 22.25% of 440 =
  23. 23.5% of 730 =
  24. 24.20% of 630 =
  25. 25.25% of 230 =
  26. 26.5% of 880 =
  27. 27.20% of 160 =
  28. 28.20% of 110 =
  29. 29.1% of 160 =
  30. 30.50% of 530 =
  31. 31.5% of 380 =
  32. 32.5% of 680 =
  33. 33.25% of 360 =
  34. 34.50% of 420 =
  35. 35.1% of 680 =
  36. 36.10% of 690 =
  37. 37.15% of 560 =
  38. 38.1% of 610 =
  39. 39.20% of 190 =
  40. 40.25% of 30 =

Answer key

  1. 8
  2. 36
  3. 8.8
  4. 31
  5. 134
  6. 37
  7. 160
  8. 126
  9. 16.5
  10. 154
  11. 46
  12. 27.5
  13. 50
  14. 55
  15. 30.5
  16. 7.5
  17. 42.5
  18. 3.5
  19. 11
  20. 41
  21. 50
  22. 110
  23. 36.5
  24. 126
  25. 57.5
  26. 44
  27. 32
  28. 22
  29. 1.6
  30. 265
  31. 19
  32. 34
  33. 90
  34. 210
  35. 6.8
  36. 69
  37. 84
  38. 6.1
  39. 38
  40. 7.5

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