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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 352 · 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. 1.1% of 710 =
  2. 2.50% of 490 =
  3. 3.5% of 240 =
  4. 4.15% of 50 =
  5. 5.10% of 520 =
  6. 6.15% of 560 =
  7. 7.5% of 70 =
  8. 8.20% of 280 =
  9. 9.50% of 750 =
  10. 10.20% of 160 =
  11. 11.20% of 700 =
  12. 12.15% of 50 =
  13. 13.10% of 110 =
  14. 14.50% of 190 =
  15. 15.1% of 700 =
  16. 16.20% of 520 =
  17. 17.50% of 100 =
  18. 18.5% of 100 =
  19. 19.5% of 670 =
  20. 20.50% of 360 =
  21. 21.50% of 270 =
  22. 22.10% of 80 =
  23. 23.50% of 470 =
  24. 24.5% of 160 =
  25. 25.15% of 130 =
  26. 26.50% of 650 =
  27. 27.5% of 600 =
  28. 28.10% of 360 =
  29. 29.1% of 720 =
  30. 30.25% of 670 =
  31. 31.5% of 350 =
  32. 32.15% of 410 =
  33. 33.15% of 630 =
  34. 34.1% of 770 =
  35. 35.10% of 380 =
  36. 36.20% of 420 =
  37. 37.1% of 140 =
  38. 38.10% of 880 =
  39. 39.10% of 780 =
  40. 40.5% of 830 =

Answer key

  1. 7.1
  2. 245
  3. 12
  4. 7.5
  5. 52
  6. 84
  7. 3.5
  8. 56
  9. 375
  10. 32
  11. 140
  12. 7.5
  13. 11
  14. 95
  15. 7
  16. 104
  17. 50
  18. 5
  19. 33.5
  20. 180
  21. 135
  22. 8
  23. 235
  24. 8
  25. 19.5
  26. 325
  27. 30
  28. 36
  29. 7.2
  30. 167.5
  31. 17.5
  32. 61.5
  33. 94.5
  34. 7.7
  35. 38
  36. 84
  37. 1.4
  38. 88
  39. 78
  40. 41.5

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