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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 523 · 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 150 =
  2. 2.50% of 380 =
  3. 3.20% of 760 =
  4. 4.20% of 560 =
  5. 5.15% of 300 =
  6. 6.1% of 100 =
  7. 7.20% of 280 =
  8. 8.5% of 170 =
  9. 9.20% of 490 =
  10. 10.10% of 190 =
  11. 11.5% of 740 =
  12. 12.25% of 230 =
  13. 13.5% of 900 =
  14. 14.50% of 50 =
  15. 15.15% of 270 =
  16. 16.25% of 130 =
  17. 17.20% of 630 =
  18. 18.50% of 430 =
  19. 19.25% of 60 =
  20. 20.10% of 20 =
  21. 21.15% of 550 =
  22. 22.5% of 840 =
  23. 23.10% of 550 =
  24. 24.5% of 40 =
  25. 25.10% of 550 =
  26. 26.5% of 130 =
  27. 27.10% of 540 =
  28. 28.5% of 130 =
  29. 29.25% of 70 =
  30. 30.1% of 280 =
  31. 31.10% of 880 =
  32. 32.1% of 710 =
  33. 33.1% of 510 =
  34. 34.10% of 520 =
  35. 35.5% of 850 =
  36. 36.50% of 360 =
  37. 37.15% of 210 =
  38. 38.15% of 780 =
  39. 39.1% of 820 =
  40. 40.20% of 160 =

Answer key

  1. 15
  2. 190
  3. 152
  4. 112
  5. 45
  6. 1
  7. 56
  8. 8.5
  9. 98
  10. 19
  11. 37
  12. 57.5
  13. 45
  14. 25
  15. 40.5
  16. 32.5
  17. 126
  18. 215
  19. 15
  20. 2
  21. 82.5
  22. 42
  23. 55
  24. 2
  25. 55
  26. 6.5
  27. 54
  28. 6.5
  29. 17.5
  30. 2.8
  31. 88
  32. 7.1
  33. 5.1
  34. 52
  35. 42.5
  36. 180
  37. 31.5
  38. 117
  39. 8.2
  40. 32

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