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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 802 · 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 270 =
  2. 2.10% of 800 =
  3. 3.25% of 540 =
  4. 4.50% of 370 =
  5. 5.1% of 620 =
  6. 6.25% of 610 =
  7. 7.5% of 280 =
  8. 8.5% of 830 =
  9. 9.25% of 770 =
  10. 10.1% of 230 =
  11. 11.10% of 210 =
  12. 12.10% of 690 =
  13. 13.25% of 600 =
  14. 14.1% of 250 =
  15. 15.10% of 620 =
  16. 16.10% of 520 =
  17. 17.1% of 230 =
  18. 18.20% of 220 =
  19. 19.1% of 610 =
  20. 20.50% of 760 =
  21. 21.1% of 790 =
  22. 22.15% of 850 =
  23. 23.15% of 440 =
  24. 24.25% of 880 =
  25. 25.10% of 100 =
  26. 26.20% of 680 =
  27. 27.25% of 180 =
  28. 28.25% of 520 =
  29. 29.5% of 290 =
  30. 30.50% of 690 =
  31. 31.5% of 20 =
  32. 32.5% of 250 =
  33. 33.1% of 530 =
  34. 34.10% of 30 =
  35. 35.25% of 430 =
  36. 36.5% of 160 =
  37. 37.20% of 340 =
  38. 38.20% of 320 =
  39. 39.10% of 170 =
  40. 40.50% of 640 =

Answer key

  1. 40.5
  2. 80
  3. 135
  4. 185
  5. 6.2
  6. 152.5
  7. 14
  8. 41.5
  9. 192.5
  10. 2.3
  11. 21
  12. 69
  13. 150
  14. 2.5
  15. 62
  16. 52
  17. 2.3
  18. 44
  19. 6.1
  20. 380
  21. 7.9
  22. 127.5
  23. 66
  24. 220
  25. 10
  26. 136
  27. 45
  28. 130
  29. 14.5
  30. 345
  31. 1
  32. 12.5
  33. 5.3
  34. 3
  35. 107.5
  36. 8
  37. 68
  38. 64
  39. 17
  40. 320

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