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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 649 · 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. 1.5% of 530 =
  2. 2.15% of 610 =
  3. 3.15% of 170 =
  4. 4.5% of 660 =
  5. 5.10% of 340 =
  6. 6.50% of 240 =
  7. 7.10% of 780 =
  8. 8.15% of 350 =
  9. 9.15% of 30 =
  10. 10.20% of 30 =
  11. 11.20% of 530 =
  12. 12.25% of 40 =
  13. 13.10% of 100 =
  14. 14.25% of 870 =
  15. 15.25% of 770 =
  16. 16.1% of 70 =
  17. 17.20% of 670 =
  18. 18.1% of 740 =
  19. 19.25% of 90 =
  20. 20.15% of 500 =
  21. 21.20% of 390 =
  22. 22.50% of 620 =
  23. 23.15% of 540 =
  24. 24.20% of 520 =
  25. 25.10% of 610 =
  26. 26.50% of 220 =
  27. 27.15% of 600 =
  28. 28.15% of 410 =
  29. 29.10% of 400 =
  30. 30.25% of 430 =
  31. 31.25% of 720 =
  32. 32.50% of 230 =
  33. 33.15% of 50 =
  34. 34.25% of 680 =
  35. 35.50% of 510 =
  36. 36.25% of 750 =
  37. 37.1% of 700 =
  38. 38.15% of 110 =
  39. 39.1% of 30 =
  40. 40.25% of 80 =

Answer key

  1. 26.5
  2. 91.5
  3. 25.5
  4. 33
  5. 34
  6. 120
  7. 78
  8. 52.5
  9. 4.5
  10. 6
  11. 106
  12. 10
  13. 10
  14. 217.5
  15. 192.5
  16. 0.7
  17. 134
  18. 7.4
  19. 22.5
  20. 75
  21. 78
  22. 310
  23. 81
  24. 104
  25. 61
  26. 110
  27. 90
  28. 61.5
  29. 40
  30. 107.5
  31. 180
  32. 115
  33. 7.5
  34. 170
  35. 255
  36. 187.5
  37. 7
  38. 16.5
  39. 0.3
  40. 20

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