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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 441 · 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 150 =
  2. 2.5% of 380 =
  3. 3.50% of 680 =
  4. 4.15% of 230 =
  5. 5.15% of 340 =
  6. 6.1% of 50 =
  7. 7.5% of 270 =
  8. 8.20% of 280 =
  9. 9.50% of 490 =
  10. 10.50% of 210 =
  11. 11.50% of 170 =
  12. 12.15% of 140 =
  13. 13.15% of 60 =
  14. 14.15% of 460 =
  15. 15.5% of 290 =
  16. 16.25% of 310 =
  17. 17.10% of 390 =
  18. 18.25% of 210 =
  19. 19.1% of 140 =
  20. 20.50% of 200 =
  21. 21.10% of 820 =
  22. 22.20% of 320 =
  23. 23.15% of 270 =
  24. 24.20% of 140 =
  25. 25.1% of 30 =
  26. 26.25% of 30 =
  27. 27.1% of 620 =
  28. 28.50% of 80 =
  29. 29.50% of 430 =
  30. 30.50% of 390 =
  31. 31.15% of 70 =
  32. 32.15% of 880 =
  33. 33.5% of 330 =
  34. 34.10% of 860 =
  35. 35.15% of 60 =
  36. 36.50% of 310 =
  37. 37.5% of 370 =
  38. 38.50% of 500 =
  39. 39.15% of 300 =
  40. 40.20% of 450 =

Answer key

  1. 22.5
  2. 19
  3. 340
  4. 34.5
  5. 51
  6. 0.5
  7. 13.5
  8. 56
  9. 245
  10. 105
  11. 85
  12. 21
  13. 9
  14. 69
  15. 14.5
  16. 77.5
  17. 39
  18. 52.5
  19. 1.4
  20. 100
  21. 82
  22. 64
  23. 40.5
  24. 28
  25. 0.3
  26. 7.5
  27. 6.2
  28. 40
  29. 215
  30. 195
  31. 10.5
  32. 132
  33. 16.5
  34. 86
  35. 9
  36. 155
  37. 18.5
  38. 250
  39. 45
  40. 90

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