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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 656 · 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 830 =
  2. 2.5% of 260 =
  3. 3.10% of 380 =
  4. 4.5% of 810 =
  5. 5.10% of 470 =
  6. 6.15% of 630 =
  7. 7.1% of 600 =
  8. 8.10% of 530 =
  9. 9.50% of 370 =
  10. 10.50% of 650 =
  11. 11.25% of 330 =
  12. 12.5% of 590 =
  13. 13.15% of 20 =
  14. 14.50% of 750 =
  15. 15.20% of 260 =
  16. 16.20% of 530 =
  17. 17.25% of 270 =
  18. 18.25% of 240 =
  19. 19.1% of 780 =
  20. 20.10% of 340 =
  21. 21.15% of 340 =
  22. 22.5% of 260 =
  23. 23.25% of 650 =
  24. 24.5% of 130 =
  25. 25.1% of 50 =
  26. 26.15% of 760 =
  27. 27.20% of 630 =
  28. 28.1% of 670 =
  29. 29.15% of 780 =
  30. 30.5% of 870 =
  31. 31.1% of 100 =
  32. 32.10% of 260 =
  33. 33.10% of 270 =
  34. 34.50% of 350 =
  35. 35.1% of 740 =
  36. 36.1% of 620 =
  37. 37.50% of 390 =
  38. 38.20% of 710 =
  39. 39.1% of 600 =
  40. 40.5% of 770 =

Answer key

  1. 83
  2. 13
  3. 38
  4. 40.5
  5. 47
  6. 94.5
  7. 6
  8. 53
  9. 185
  10. 325
  11. 82.5
  12. 29.5
  13. 3
  14. 375
  15. 52
  16. 106
  17. 67.5
  18. 60
  19. 7.8
  20. 34
  21. 51
  22. 13
  23. 162.5
  24. 6.5
  25. 0.5
  26. 114
  27. 126
  28. 6.7
  29. 117
  30. 43.5
  31. 1
  32. 26
  33. 27
  34. 175
  35. 7.4
  36. 6.2
  37. 195
  38. 142
  39. 6
  40. 38.5

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