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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 383 · 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 30 =
  2. 2.10% of 770 =
  3. 3.50% of 110 =
  4. 4.1% of 490 =
  5. 5.5% of 740 =
  6. 6.10% of 330 =
  7. 7.5% of 740 =
  8. 8.15% of 310 =
  9. 9.25% of 440 =
  10. 10.20% of 320 =
  11. 11.15% of 50 =
  12. 12.20% of 180 =
  13. 13.1% of 370 =
  14. 14.1% of 150 =
  15. 15.1% of 650 =
  16. 16.5% of 320 =
  17. 17.25% of 560 =
  18. 18.50% of 840 =
  19. 19.50% of 20 =
  20. 20.25% of 360 =
  21. 21.15% of 770 =
  22. 22.50% of 900 =
  23. 23.50% of 530 =
  24. 24.1% of 780 =
  25. 25.50% of 40 =
  26. 26.50% of 730 =
  27. 27.1% of 400 =
  28. 28.10% of 360 =
  29. 29.1% of 480 =
  30. 30.20% of 390 =
  31. 31.1% of 140 =
  32. 32.20% of 650 =
  33. 33.20% of 610 =
  34. 34.15% of 650 =
  35. 35.10% of 880 =
  36. 36.20% of 40 =
  37. 37.1% of 650 =
  38. 38.10% of 540 =
  39. 39.1% of 270 =
  40. 40.1% of 620 =

Answer key

  1. 1.5
  2. 77
  3. 55
  4. 4.9
  5. 37
  6. 33
  7. 37
  8. 46.5
  9. 110
  10. 64
  11. 7.5
  12. 36
  13. 3.7
  14. 1.5
  15. 6.5
  16. 16
  17. 140
  18. 420
  19. 10
  20. 90
  21. 115.5
  22. 450
  23. 265
  24. 7.8
  25. 20
  26. 365
  27. 4
  28. 36
  29. 4.8
  30. 78
  31. 1.4
  32. 130
  33. 122
  34. 97.5
  35. 88
  36. 8
  37. 6.5
  38. 54
  39. 2.7
  40. 6.2

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