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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 200 · 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 880 =
  2. 2.10% of 820 =
  3. 3.20% of 720 =
  4. 4.1% of 880 =
  5. 5.50% of 270 =
  6. 6.5% of 340 =
  7. 7.15% of 860 =
  8. 8.10% of 160 =
  9. 9.15% of 600 =
  10. 10.25% of 390 =
  11. 11.25% of 130 =
  12. 12.50% of 20 =
  13. 13.50% of 160 =
  14. 14.25% of 630 =
  15. 15.50% of 240 =
  16. 16.25% of 270 =
  17. 17.5% of 460 =
  18. 18.20% of 750 =
  19. 19.10% of 350 =
  20. 20.50% of 620 =
  21. 21.5% of 570 =
  22. 22.20% of 80 =
  23. 23.15% of 250 =
  24. 24.5% of 900 =
  25. 25.50% of 210 =
  26. 26.10% of 110 =
  27. 27.20% of 490 =
  28. 28.25% of 90 =
  29. 29.10% of 660 =
  30. 30.5% of 220 =
  31. 31.25% of 70 =
  32. 32.20% of 580 =
  33. 33.25% of 200 =
  34. 34.50% of 660 =
  35. 35.1% of 190 =
  36. 36.10% of 760 =
  37. 37.15% of 140 =
  38. 38.15% of 120 =
  39. 39.20% of 610 =
  40. 40.20% of 80 =

Answer key

  1. 88
  2. 82
  3. 144
  4. 8.8
  5. 135
  6. 17
  7. 129
  8. 16
  9. 90
  10. 97.5
  11. 32.5
  12. 10
  13. 80
  14. 157.5
  15. 120
  16. 67.5
  17. 23
  18. 150
  19. 35
  20. 310
  21. 28.5
  22. 16
  23. 37.5
  24. 45
  25. 105
  26. 11
  27. 98
  28. 22.5
  29. 66
  30. 11
  31. 17.5
  32. 116
  33. 50
  34. 330
  35. 1.9
  36. 76
  37. 21
  38. 18
  39. 122
  40. 16

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