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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 512 · 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 720 =
  2. 2.1% of 20 =
  3. 3.15% of 730 =
  4. 4.50% of 260 =
  5. 5.1% of 320 =
  6. 6.20% of 120 =
  7. 7.5% of 570 =
  8. 8.25% of 820 =
  9. 9.10% of 90 =
  10. 10.20% of 670 =
  11. 11.15% of 210 =
  12. 12.50% of 260 =
  13. 13.5% of 880 =
  14. 14.25% of 170 =
  15. 15.1% of 370 =
  16. 16.1% of 190 =
  17. 17.50% of 20 =
  18. 18.5% of 220 =
  19. 19.1% of 320 =
  20. 20.1% of 170 =
  21. 21.15% of 680 =
  22. 22.20% of 430 =
  23. 23.1% of 780 =
  24. 24.20% of 750 =
  25. 25.10% of 190 =
  26. 26.1% of 530 =
  27. 27.15% of 70 =
  28. 28.10% of 650 =
  29. 29.1% of 40 =
  30. 30.20% of 730 =
  31. 31.5% of 290 =
  32. 32.10% of 800 =
  33. 33.1% of 40 =
  34. 34.20% of 840 =
  35. 35.5% of 660 =
  36. 36.5% of 450 =
  37. 37.1% of 670 =
  38. 38.20% of 830 =
  39. 39.15% of 740 =
  40. 40.20% of 340 =

Answer key

  1. 108
  2. 0.2
  3. 109.5
  4. 130
  5. 3.2
  6. 24
  7. 28.5
  8. 205
  9. 9
  10. 134
  11. 31.5
  12. 130
  13. 44
  14. 42.5
  15. 3.7
  16. 1.9
  17. 10
  18. 11
  19. 3.2
  20. 1.7
  21. 102
  22. 86
  23. 7.8
  24. 150
  25. 19
  26. 5.3
  27. 10.5
  28. 65
  29. 0.4
  30. 146
  31. 14.5
  32. 80
  33. 0.4
  34. 168
  35. 33
  36. 22.5
  37. 6.7
  38. 166
  39. 111
  40. 68

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