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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 372 · 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 430 =
  2. 2.10% of 680 =
  3. 3.1% of 370 =
  4. 4.1% of 210 =
  5. 5.15% of 340 =
  6. 6.10% of 810 =
  7. 7.1% of 150 =
  8. 8.10% of 80 =
  9. 9.15% of 350 =
  10. 10.20% of 800 =
  11. 11.20% of 410 =
  12. 12.15% of 580 =
  13. 13.1% of 660 =
  14. 14.15% of 500 =
  15. 15.20% of 290 =
  16. 16.5% of 430 =
  17. 17.5% of 390 =
  18. 18.50% of 610 =
  19. 19.50% of 670 =
  20. 20.15% of 660 =
  21. 21.1% of 530 =
  22. 22.20% of 450 =
  23. 23.10% of 210 =
  24. 24.5% of 540 =
  25. 25.50% of 680 =
  26. 26.50% of 440 =
  27. 27.15% of 50 =
  28. 28.1% of 360 =
  29. 29.50% of 20 =
  30. 30.5% of 620 =
  31. 31.20% of 270 =
  32. 32.5% of 70 =
  33. 33.5% of 670 =
  34. 34.5% of 620 =
  35. 35.5% of 370 =
  36. 36.15% of 190 =
  37. 37.25% of 650 =
  38. 38.5% of 30 =
  39. 39.25% of 300 =
  40. 40.5% of 650 =

Answer key

  1. 43
  2. 68
  3. 3.7
  4. 2.1
  5. 51
  6. 81
  7. 1.5
  8. 8
  9. 52.5
  10. 160
  11. 82
  12. 87
  13. 6.6
  14. 75
  15. 58
  16. 21.5
  17. 19.5
  18. 305
  19. 335
  20. 99
  21. 5.3
  22. 90
  23. 21
  24. 27
  25. 340
  26. 220
  27. 7.5
  28. 3.6
  29. 10
  30. 31
  31. 54
  32. 3.5
  33. 33.5
  34. 31
  35. 18.5
  36. 28.5
  37. 162.5
  38. 1.5
  39. 75
  40. 32.5

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