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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 747 · 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. 1.50% of 530 =
  2. 2.50% of 740 =
  3. 3.50% of 810 =
  4. 4.5% of 160 =
  5. 5.25% of 320 =
  6. 6.25% of 310 =
  7. 7.10% of 750 =
  8. 8.25% of 250 =
  9. 9.10% of 780 =
  10. 10.15% of 650 =
  11. 11.20% of 250 =
  12. 12.25% of 740 =
  13. 13.10% of 60 =
  14. 14.25% of 420 =
  15. 15.20% of 520 =
  16. 16.15% of 630 =
  17. 17.10% of 510 =
  18. 18.10% of 80 =
  19. 19.20% of 740 =
  20. 20.20% of 160 =
  21. 21.10% of 700 =
  22. 22.1% of 850 =
  23. 23.25% of 390 =
  24. 24.1% of 880 =
  25. 25.15% of 850 =
  26. 26.25% of 190 =
  27. 27.1% of 900 =
  28. 28.25% of 210 =
  29. 29.1% of 640 =
  30. 30.15% of 870 =
  31. 31.5% of 490 =
  32. 32.10% of 410 =
  33. 33.20% of 340 =
  34. 34.5% of 60 =
  35. 35.25% of 830 =
  36. 36.25% of 210 =
  37. 37.10% of 200 =
  38. 38.50% of 420 =
  39. 39.25% of 560 =
  40. 40.25% of 240 =

Answer key

  1. 265
  2. 370
  3. 405
  4. 8
  5. 80
  6. 77.5
  7. 75
  8. 62.5
  9. 78
  10. 97.5
  11. 50
  12. 185
  13. 6
  14. 105
  15. 104
  16. 94.5
  17. 51
  18. 8
  19. 148
  20. 32
  21. 70
  22. 8.5
  23. 97.5
  24. 8.8
  25. 127.5
  26. 47.5
  27. 9
  28. 52.5
  29. 6.4
  30. 130.5
  31. 24.5
  32. 41
  33. 68
  34. 3
  35. 207.5
  36. 52.5
  37. 20
  38. 210
  39. 140
  40. 60

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