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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 669 · 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. 1.1% of 180 =
  2. 2.25% of 350 =
  3. 3.5% of 610 =
  4. 4.10% of 880 =
  5. 5.20% of 90 =
  6. 6.20% of 810 =
  7. 7.25% of 470 =
  8. 8.25% of 210 =
  9. 9.1% of 690 =
  10. 10.5% of 620 =
  11. 11.20% of 530 =
  12. 12.15% of 880 =
  13. 13.20% of 510 =
  14. 14.1% of 850 =
  15. 15.25% of 580 =
  16. 16.15% of 420 =
  17. 17.50% of 120 =
  18. 18.25% of 150 =
  19. 19.10% of 350 =
  20. 20.5% of 50 =
  21. 21.20% of 480 =
  22. 22.20% of 880 =
  23. 23.20% of 190 =
  24. 24.15% of 290 =
  25. 25.50% of 30 =
  26. 26.10% of 20 =
  27. 27.20% of 60 =
  28. 28.25% of 130 =
  29. 29.25% of 280 =
  30. 30.50% of 280 =
  31. 31.15% of 170 =
  32. 32.1% of 780 =
  33. 33.25% of 450 =
  34. 34.25% of 40 =
  35. 35.1% of 370 =
  36. 36.15% of 630 =
  37. 37.10% of 260 =
  38. 38.50% of 200 =
  39. 39.50% of 90 =
  40. 40.5% of 20 =

Answer key

  1. 1.8
  2. 87.5
  3. 30.5
  4. 88
  5. 18
  6. 162
  7. 117.5
  8. 52.5
  9. 6.9
  10. 31
  11. 106
  12. 132
  13. 102
  14. 8.5
  15. 145
  16. 63
  17. 60
  18. 37.5
  19. 35
  20. 2.5
  21. 96
  22. 176
  23. 38
  24. 43.5
  25. 15
  26. 2
  27. 12
  28. 32.5
  29. 70
  30. 140
  31. 25.5
  32. 7.8
  33. 112.5
  34. 10
  35. 3.7
  36. 94.5
  37. 26
  38. 100
  39. 45
  40. 1

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