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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 693 · 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. 1.15% of 830 =
  2. 2.15% of 880 =
  3. 3.10% of 550 =
  4. 4.50% of 110 =
  5. 5.25% of 500 =
  6. 6.1% of 630 =
  7. 7.10% of 600 =
  8. 8.25% of 540 =
  9. 9.10% of 20 =
  10. 10.1% of 400 =
  11. 11.1% of 80 =
  12. 12.25% of 900 =
  13. 13.25% of 310 =
  14. 14.25% of 80 =
  15. 15.5% of 170 =
  16. 16.1% of 340 =
  17. 17.25% of 240 =
  18. 18.15% of 610 =
  19. 19.5% of 390 =
  20. 20.50% of 350 =
  21. 21.20% of 270 =
  22. 22.1% of 650 =
  23. 23.5% of 650 =
  24. 24.25% of 20 =
  25. 25.1% of 880 =
  26. 26.1% of 420 =
  27. 27.10% of 760 =
  28. 28.25% of 270 =
  29. 29.50% of 220 =
  30. 30.10% of 550 =
  31. 31.5% of 600 =
  32. 32.20% of 600 =
  33. 33.50% of 400 =
  34. 34.5% of 20 =
  35. 35.25% of 190 =
  36. 36.5% of 190 =
  37. 37.20% of 420 =
  38. 38.10% of 120 =
  39. 39.25% of 130 =
  40. 40.15% of 630 =

Answer key

  1. 124.5
  2. 132
  3. 55
  4. 55
  5. 125
  6. 6.3
  7. 60
  8. 135
  9. 2
  10. 4
  11. 0.8
  12. 225
  13. 77.5
  14. 20
  15. 8.5
  16. 3.4
  17. 60
  18. 91.5
  19. 19.5
  20. 175
  21. 54
  22. 6.5
  23. 32.5
  24. 5
  25. 8.8
  26. 4.2
  27. 76
  28. 67.5
  29. 110
  30. 55
  31. 30
  32. 120
  33. 200
  34. 1
  35. 47.5
  36. 9.5
  37. 84
  38. 12
  39. 32.5
  40. 94.5

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