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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 618 · 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. 1.20% of 130 =
  2. 2.15% of 400 =
  3. 3.20% of 850 =
  4. 4.25% of 370 =
  5. 5.20% of 780 =
  6. 6.5% of 180 =
  7. 7.5% of 220 =
  8. 8.1% of 100 =
  9. 9.5% of 510 =
  10. 10.50% of 140 =
  11. 11.15% of 300 =
  12. 12.10% of 400 =
  13. 13.20% of 630 =
  14. 14.25% of 720 =
  15. 15.1% of 320 =
  16. 16.50% of 290 =
  17. 17.15% of 370 =
  18. 18.50% of 510 =
  19. 19.50% of 250 =
  20. 20.15% of 420 =
  21. 21.10% of 370 =
  22. 22.1% of 740 =
  23. 23.15% of 30 =
  24. 24.1% of 630 =
  25. 25.5% of 140 =
  26. 26.50% of 130 =
  27. 27.1% of 540 =
  28. 28.25% of 850 =
  29. 29.5% of 900 =
  30. 30.5% of 220 =
  31. 31.1% of 270 =
  32. 32.5% of 50 =
  33. 33.25% of 40 =
  34. 34.10% of 710 =
  35. 35.10% of 670 =
  36. 36.1% of 850 =
  37. 37.10% of 310 =
  38. 38.20% of 830 =
  39. 39.1% of 140 =
  40. 40.1% of 200 =

Answer key

  1. 26
  2. 60
  3. 170
  4. 92.5
  5. 156
  6. 9
  7. 11
  8. 1
  9. 25.5
  10. 70
  11. 45
  12. 40
  13. 126
  14. 180
  15. 3.2
  16. 145
  17. 55.5
  18. 255
  19. 125
  20. 63
  21. 37
  22. 7.4
  23. 4.5
  24. 6.3
  25. 7
  26. 65
  27. 5.4
  28. 212.5
  29. 45
  30. 11
  31. 2.7
  32. 2.5
  33. 10
  34. 71
  35. 67
  36. 8.5
  37. 31
  38. 166
  39. 1.4
  40. 2

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