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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 257 · 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 620 =
  2. 2.10% of 450 =
  3. 3.20% of 20 =
  4. 4.20% of 30 =
  5. 5.10% of 590 =
  6. 6.25% of 860 =
  7. 7.20% of 200 =
  8. 8.50% of 700 =
  9. 9.5% of 650 =
  10. 10.1% of 350 =
  11. 11.1% of 540 =
  12. 12.10% of 340 =
  13. 13.25% of 770 =
  14. 14.50% of 40 =
  15. 15.15% of 810 =
  16. 16.20% of 850 =
  17. 17.20% of 690 =
  18. 18.50% of 900 =
  19. 19.5% of 640 =
  20. 20.50% of 780 =
  21. 21.25% of 640 =
  22. 22.20% of 880 =
  23. 23.15% of 780 =
  24. 24.25% of 710 =
  25. 25.50% of 630 =
  26. 26.1% of 140 =
  27. 27.1% of 350 =
  28. 28.25% of 770 =
  29. 29.1% of 130 =
  30. 30.5% of 110 =
  31. 31.5% of 220 =
  32. 32.25% of 140 =
  33. 33.15% of 480 =
  34. 34.20% of 670 =
  35. 35.25% of 480 =
  36. 36.1% of 170 =
  37. 37.20% of 350 =
  38. 38.5% of 60 =
  39. 39.50% of 40 =
  40. 40.15% of 560 =

Answer key

  1. 124
  2. 45
  3. 4
  4. 6
  5. 59
  6. 215
  7. 40
  8. 350
  9. 32.5
  10. 3.5
  11. 5.4
  12. 34
  13. 192.5
  14. 20
  15. 121.5
  16. 170
  17. 138
  18. 450
  19. 32
  20. 390
  21. 160
  22. 176
  23. 117
  24. 177.5
  25. 315
  26. 1.4
  27. 3.5
  28. 192.5
  29. 1.3
  30. 5.5
  31. 11
  32. 35
  33. 72
  34. 134
  35. 120
  36. 1.7
  37. 70
  38. 3
  39. 20
  40. 84

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