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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 633 · 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 670 =
  2. 2.1% of 120 =
  3. 3.20% of 80 =
  4. 4.20% of 820 =
  5. 5.5% of 280 =
  6. 6.50% of 490 =
  7. 7.1% of 80 =
  8. 8.25% of 450 =
  9. 9.1% of 320 =
  10. 10.10% of 220 =
  11. 11.20% of 490 =
  12. 12.20% of 530 =
  13. 13.10% of 220 =
  14. 14.50% of 820 =
  15. 15.5% of 50 =
  16. 16.20% of 200 =
  17. 17.50% of 560 =
  18. 18.20% of 690 =
  19. 19.10% of 100 =
  20. 20.25% of 350 =
  21. 21.5% of 750 =
  22. 22.25% of 900 =
  23. 23.25% of 890 =
  24. 24.5% of 610 =
  25. 25.15% of 760 =
  26. 26.5% of 140 =
  27. 27.20% of 850 =
  28. 28.15% of 370 =
  29. 29.1% of 330 =
  30. 30.25% of 530 =
  31. 31.15% of 880 =
  32. 32.50% of 760 =
  33. 33.50% of 500 =
  34. 34.25% of 500 =
  35. 35.25% of 70 =
  36. 36.20% of 840 =
  37. 37.10% of 110 =
  38. 38.1% of 260 =
  39. 39.50% of 740 =
  40. 40.1% of 370 =

Answer key

  1. 67
  2. 1.2
  3. 16
  4. 164
  5. 14
  6. 245
  7. 0.8
  8. 112.5
  9. 3.2
  10. 22
  11. 98
  12. 106
  13. 22
  14. 410
  15. 2.5
  16. 40
  17. 280
  18. 138
  19. 10
  20. 87.5
  21. 37.5
  22. 225
  23. 222.5
  24. 30.5
  25. 114
  26. 7
  27. 170
  28. 55.5
  29. 3.3
  30. 132.5
  31. 132
  32. 380
  33. 250
  34. 125
  35. 17.5
  36. 168
  37. 11
  38. 2.6
  39. 370
  40. 3.7

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