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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 79 · 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 310 =
  2. 2.5% of 820 =
  3. 3.1% of 700 =
  4. 4.15% of 250 =
  5. 5.1% of 550 =
  6. 6.25% of 90 =
  7. 7.5% of 250 =
  8. 8.50% of 320 =
  9. 9.10% of 610 =
  10. 10.50% of 550 =
  11. 11.15% of 630 =
  12. 12.10% of 120 =
  13. 13.25% of 300 =
  14. 14.10% of 40 =
  15. 15.15% of 20 =
  16. 16.10% of 600 =
  17. 17.5% of 530 =
  18. 18.50% of 490 =
  19. 19.50% of 690 =
  20. 20.5% of 640 =
  21. 21.10% of 630 =
  22. 22.10% of 190 =
  23. 23.10% of 190 =
  24. 24.1% of 240 =
  25. 25.10% of 350 =
  26. 26.20% of 40 =
  27. 27.5% of 200 =
  28. 28.50% of 610 =
  29. 29.5% of 860 =
  30. 30.25% of 170 =
  31. 31.25% of 770 =
  32. 32.20% of 510 =
  33. 33.5% of 460 =
  34. 34.25% of 680 =
  35. 35.20% of 900 =
  36. 36.25% of 560 =
  37. 37.10% of 540 =
  38. 38.25% of 790 =
  39. 39.5% of 260 =
  40. 40.15% of 110 =

Answer key

  1. 155
  2. 41
  3. 7
  4. 37.5
  5. 5.5
  6. 22.5
  7. 12.5
  8. 160
  9. 61
  10. 275
  11. 94.5
  12. 12
  13. 75
  14. 4
  15. 3
  16. 60
  17. 26.5
  18. 245
  19. 345
  20. 32
  21. 63
  22. 19
  23. 19
  24. 2.4
  25. 35
  26. 8
  27. 10
  28. 305
  29. 43
  30. 42.5
  31. 192.5
  32. 102
  33. 23
  34. 170
  35. 180
  36. 140
  37. 54
  38. 197.5
  39. 13
  40. 16.5

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