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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 96 · 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. 1.1% of 330 =
  2. 2.10% of 720 =
  3. 3.1% of 190 =
  4. 4.25% of 310 =
  5. 5.20% of 40 =
  6. 6.1% of 560 =
  7. 7.10% of 390 =
  8. 8.20% of 670 =
  9. 9.20% of 160 =
  10. 10.50% of 80 =
  11. 11.50% of 400 =
  12. 12.15% of 250 =
  13. 13.15% of 190 =
  14. 14.15% of 280 =
  15. 15.5% of 210 =
  16. 16.1% of 360 =
  17. 17.1% of 670 =
  18. 18.25% of 130 =
  19. 19.15% of 840 =
  20. 20.10% of 50 =
  21. 21.20% of 650 =
  22. 22.50% of 660 =
  23. 23.1% of 440 =
  24. 24.15% of 90 =
  25. 25.1% of 140 =
  26. 26.50% of 130 =
  27. 27.1% of 250 =
  28. 28.20% of 530 =
  29. 29.25% of 100 =
  30. 30.50% of 810 =
  31. 31.1% of 340 =
  32. 32.5% of 710 =
  33. 33.50% of 220 =
  34. 34.25% of 650 =
  35. 35.10% of 770 =
  36. 36.5% of 20 =
  37. 37.20% of 650 =
  38. 38.25% of 700 =
  39. 39.1% of 860 =
  40. 40.15% of 670 =

Answer key

  1. 3.3
  2. 72
  3. 1.9
  4. 77.5
  5. 8
  6. 5.6
  7. 39
  8. 134
  9. 32
  10. 40
  11. 200
  12. 37.5
  13. 28.5
  14. 42
  15. 10.5
  16. 3.6
  17. 6.7
  18. 32.5
  19. 126
  20. 5
  21. 130
  22. 330
  23. 4.4
  24. 13.5
  25. 1.4
  26. 65
  27. 2.5
  28. 106
  29. 25
  30. 405
  31. 3.4
  32. 35.5
  33. 110
  34. 162.5
  35. 77
  36. 1
  37. 130
  38. 175
  39. 8.6
  40. 100.5

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