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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 230 · 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. 1.10% of 390 =
  2. 2.10% of 630 =
  3. 3.25% of 630 =
  4. 4.20% of 550 =
  5. 5.10% of 90 =
  6. 6.50% of 220 =
  7. 7.20% of 90 =
  8. 8.5% of 100 =
  9. 9.1% of 680 =
  10. 10.10% of 250 =
  11. 11.25% of 890 =
  12. 12.10% of 560 =
  13. 13.20% of 300 =
  14. 14.5% of 450 =
  15. 15.10% of 760 =
  16. 16.25% of 450 =
  17. 17.50% of 420 =
  18. 18.20% of 30 =
  19. 19.1% of 250 =
  20. 20.50% of 230 =
  21. 21.10% of 760 =
  22. 22.10% of 160 =
  23. 23.25% of 500 =
  24. 24.10% of 560 =
  25. 25.20% of 130 =
  26. 26.10% of 260 =
  27. 27.10% of 30 =
  28. 28.50% of 890 =
  29. 29.20% of 720 =
  30. 30.20% of 490 =
  31. 31.10% of 230 =
  32. 32.1% of 590 =
  33. 33.25% of 130 =
  34. 34.10% of 160 =
  35. 35.1% of 400 =
  36. 36.15% of 100 =
  37. 37.15% of 450 =
  38. 38.20% of 270 =
  39. 39.25% of 220 =
  40. 40.20% of 780 =

Answer key

  1. 39
  2. 63
  3. 157.5
  4. 110
  5. 9
  6. 110
  7. 18
  8. 5
  9. 6.8
  10. 25
  11. 222.5
  12. 56
  13. 60
  14. 22.5
  15. 76
  16. 112.5
  17. 210
  18. 6
  19. 2.5
  20. 115
  21. 76
  22. 16
  23. 125
  24. 56
  25. 26
  26. 26
  27. 3
  28. 445
  29. 144
  30. 98
  31. 23
  32. 5.9
  33. 32.5
  34. 16
  35. 4
  36. 15
  37. 67.5
  38. 54
  39. 55
  40. 156

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