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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 315 · 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 850 =
  2. 2.50% of 880 =
  3. 3.15% of 190 =
  4. 4.25% of 170 =
  5. 5.1% of 490 =
  6. 6.10% of 160 =
  7. 7.5% of 850 =
  8. 8.10% of 710 =
  9. 9.10% of 620 =
  10. 10.20% of 680 =
  11. 11.15% of 90 =
  12. 12.15% of 710 =
  13. 13.10% of 440 =
  14. 14.20% of 100 =
  15. 15.1% of 500 =
  16. 16.25% of 580 =
  17. 17.15% of 390 =
  18. 18.10% of 440 =
  19. 19.20% of 630 =
  20. 20.50% of 560 =
  21. 21.50% of 400 =
  22. 22.25% of 770 =
  23. 23.20% of 230 =
  24. 24.1% of 90 =
  25. 25.5% of 830 =
  26. 26.5% of 800 =
  27. 27.25% of 60 =
  28. 28.10% of 810 =
  29. 29.10% of 630 =
  30. 30.15% of 630 =
  31. 31.50% of 380 =
  32. 32.50% of 820 =
  33. 33.25% of 900 =
  34. 34.20% of 540 =
  35. 35.25% of 230 =
  36. 36.15% of 650 =
  37. 37.5% of 310 =
  38. 38.5% of 340 =
  39. 39.1% of 330 =
  40. 40.50% of 550 =

Answer key

  1. 127.5
  2. 440
  3. 28.5
  4. 42.5
  5. 4.9
  6. 16
  7. 42.5
  8. 71
  9. 62
  10. 136
  11. 13.5
  12. 106.5
  13. 44
  14. 20
  15. 5
  16. 145
  17. 58.5
  18. 44
  19. 126
  20. 280
  21. 200
  22. 192.5
  23. 46
  24. 0.9
  25. 41.5
  26. 40
  27. 15
  28. 81
  29. 63
  30. 94.5
  31. 190
  32. 410
  33. 225
  34. 108
  35. 57.5
  36. 97.5
  37. 15.5
  38. 17
  39. 3.3
  40. 275

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