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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 20 · 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 710 =
  2. 2.1% of 40 =
  3. 3.5% of 70 =
  4. 4.10% of 100 =
  5. 5.50% of 90 =
  6. 6.25% of 480 =
  7. 7.50% of 520 =
  8. 8.50% of 590 =
  9. 9.50% of 470 =
  10. 10.50% of 520 =
  11. 11.15% of 270 =
  12. 12.50% of 900 =
  13. 13.25% of 760 =
  14. 14.25% of 80 =
  15. 15.50% of 460 =
  16. 16.10% of 250 =
  17. 17.5% of 480 =
  18. 18.15% of 250 =
  19. 19.10% of 20 =
  20. 20.5% of 890 =
  21. 21.5% of 120 =
  22. 22.5% of 530 =
  23. 23.15% of 150 =
  24. 24.10% of 680 =
  25. 25.25% of 680 =
  26. 26.10% of 400 =
  27. 27.50% of 620 =
  28. 28.5% of 650 =
  29. 29.25% of 430 =
  30. 30.1% of 180 =
  31. 31.10% of 30 =
  32. 32.25% of 410 =
  33. 33.1% of 390 =
  34. 34.50% of 180 =
  35. 35.5% of 490 =
  36. 36.50% of 590 =
  37. 37.25% of 180 =
  38. 38.1% of 240 =
  39. 39.5% of 650 =
  40. 40.5% of 340 =

Answer key

  1. 35.5
  2. 0.4
  3. 3.5
  4. 10
  5. 45
  6. 120
  7. 260
  8. 295
  9. 235
  10. 260
  11. 40.5
  12. 450
  13. 190
  14. 20
  15. 230
  16. 25
  17. 24
  18. 37.5
  19. 2
  20. 44.5
  21. 6
  22. 26.5
  23. 22.5
  24. 68
  25. 170
  26. 40
  27. 310
  28. 32.5
  29. 107.5
  30. 1.8
  31. 3
  32. 102.5
  33. 3.9
  34. 90
  35. 24.5
  36. 295
  37. 45
  38. 2.4
  39. 32.5
  40. 17

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