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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 647 · 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 620 =
  2. 2.25% of 510 =
  3. 3.20% of 30 =
  4. 4.1% of 690 =
  5. 5.20% of 430 =
  6. 6.20% of 860 =
  7. 7.25% of 160 =
  8. 8.15% of 190 =
  9. 9.1% of 440 =
  10. 10.20% of 270 =
  11. 11.25% of 280 =
  12. 12.50% of 410 =
  13. 13.5% of 140 =
  14. 14.50% of 460 =
  15. 15.10% of 180 =
  16. 16.15% of 510 =
  17. 17.20% of 350 =
  18. 18.1% of 260 =
  19. 19.15% of 80 =
  20. 20.20% of 490 =
  21. 21.15% of 690 =
  22. 22.50% of 530 =
  23. 23.1% of 860 =
  24. 24.15% of 550 =
  25. 25.10% of 850 =
  26. 26.5% of 240 =
  27. 27.50% of 760 =
  28. 28.1% of 760 =
  29. 29.5% of 510 =
  30. 30.1% of 760 =
  31. 31.1% of 690 =
  32. 32.50% of 900 =
  33. 33.15% of 720 =
  34. 34.5% of 420 =
  35. 35.1% of 850 =
  36. 36.1% of 580 =
  37. 37.50% of 680 =
  38. 38.20% of 780 =
  39. 39.10% of 790 =
  40. 40.50% of 180 =

Answer key

  1. 93
  2. 127.5
  3. 6
  4. 6.9
  5. 86
  6. 172
  7. 40
  8. 28.5
  9. 4.4
  10. 54
  11. 70
  12. 205
  13. 7
  14. 230
  15. 18
  16. 76.5
  17. 70
  18. 2.6
  19. 12
  20. 98
  21. 103.5
  22. 265
  23. 8.6
  24. 82.5
  25. 85
  26. 12
  27. 380
  28. 7.6
  29. 25.5
  30. 7.6
  31. 6.9
  32. 450
  33. 108
  34. 21
  35. 8.5
  36. 5.8
  37. 340
  38. 156
  39. 79
  40. 90

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