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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 597 · 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 110 =
  2. 2.10% of 480 =
  3. 3.50% of 850 =
  4. 4.10% of 180 =
  5. 5.10% of 320 =
  6. 6.25% of 890 =
  7. 7.5% of 80 =
  8. 8.15% of 30 =
  9. 9.50% of 660 =
  10. 10.1% of 270 =
  11. 11.5% of 390 =
  12. 12.50% of 850 =
  13. 13.15% of 260 =
  14. 14.5% of 320 =
  15. 15.1% of 890 =
  16. 16.20% of 150 =
  17. 17.10% of 60 =
  18. 18.10% of 170 =
  19. 19.25% of 150 =
  20. 20.1% of 510 =
  21. 21.1% of 350 =
  22. 22.15% of 140 =
  23. 23.5% of 270 =
  24. 24.10% of 660 =
  25. 25.25% of 340 =
  26. 26.5% of 500 =
  27. 27.1% of 420 =
  28. 28.25% of 160 =
  29. 29.15% of 760 =
  30. 30.1% of 260 =
  31. 31.25% of 120 =
  32. 32.25% of 650 =
  33. 33.25% of 800 =
  34. 34.1% of 410 =
  35. 35.15% of 410 =
  36. 36.1% of 840 =
  37. 37.10% of 220 =
  38. 38.20% of 380 =
  39. 39.1% of 490 =
  40. 40.1% of 20 =

Answer key

  1. 55
  2. 48
  3. 425
  4. 18
  5. 32
  6. 222.5
  7. 4
  8. 4.5
  9. 330
  10. 2.7
  11. 19.5
  12. 425
  13. 39
  14. 16
  15. 8.9
  16. 30
  17. 6
  18. 17
  19. 37.5
  20. 5.1
  21. 3.5
  22. 21
  23. 13.5
  24. 66
  25. 85
  26. 25
  27. 4.2
  28. 40
  29. 114
  30. 2.6
  31. 30
  32. 162.5
  33. 200
  34. 4.1
  35. 61.5
  36. 8.4
  37. 22
  38. 76
  39. 4.9
  40. 0.2

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