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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 598 · 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 650 =
  2. 2.20% of 130 =
  3. 3.15% of 360 =
  4. 4.50% of 560 =
  5. 5.5% of 270 =
  6. 6.15% of 830 =
  7. 7.50% of 230 =
  8. 8.5% of 250 =
  9. 9.20% of 110 =
  10. 10.5% of 670 =
  11. 11.5% of 690 =
  12. 12.1% of 490 =
  13. 13.1% of 830 =
  14. 14.20% of 210 =
  15. 15.1% of 230 =
  16. 16.50% of 600 =
  17. 17.1% of 150 =
  18. 18.20% of 750 =
  19. 19.5% of 880 =
  20. 20.10% of 540 =
  21. 21.50% of 420 =
  22. 22.10% of 770 =
  23. 23.25% of 320 =
  24. 24.10% of 170 =
  25. 25.20% of 630 =
  26. 26.1% of 380 =
  27. 27.5% of 830 =
  28. 28.25% of 860 =
  29. 29.25% of 410 =
  30. 30.20% of 770 =
  31. 31.10% of 130 =
  32. 32.15% of 290 =
  33. 33.25% of 360 =
  34. 34.1% of 470 =
  35. 35.50% of 160 =
  36. 36.5% of 540 =
  37. 37.1% of 560 =
  38. 38.15% of 250 =
  39. 39.10% of 550 =
  40. 40.15% of 640 =

Answer key

  1. 97.5
  2. 26
  3. 54
  4. 280
  5. 13.5
  6. 124.5
  7. 115
  8. 12.5
  9. 22
  10. 33.5
  11. 34.5
  12. 4.9
  13. 8.3
  14. 42
  15. 2.3
  16. 300
  17. 1.5
  18. 150
  19. 44
  20. 54
  21. 210
  22. 77
  23. 80
  24. 17
  25. 126
  26. 3.8
  27. 41.5
  28. 215
  29. 102.5
  30. 154
  31. 13
  32. 43.5
  33. 90
  34. 4.7
  35. 80
  36. 27
  37. 5.6
  38. 37.5
  39. 55
  40. 96

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