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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 977 · 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 490 =
  2. 2.5% of 800 =
  3. 3.25% of 840 =
  4. 4.1% of 390 =
  5. 5.15% of 360 =
  6. 6.10% of 400 =
  7. 7.25% of 200 =
  8. 8.10% of 560 =
  9. 9.10% of 220 =
  10. 10.10% of 620 =
  11. 11.25% of 500 =
  12. 12.50% of 270 =
  13. 13.10% of 770 =
  14. 14.5% of 500 =
  15. 15.1% of 430 =
  16. 16.20% of 830 =
  17. 17.25% of 410 =
  18. 18.15% of 900 =
  19. 19.5% of 550 =
  20. 20.50% of 880 =
  21. 21.25% of 560 =
  22. 22.25% of 50 =
  23. 23.20% of 640 =
  24. 24.10% of 830 =
  25. 25.20% of 160 =
  26. 26.20% of 830 =
  27. 27.10% of 630 =
  28. 28.10% of 360 =
  29. 29.15% of 260 =
  30. 30.5% of 20 =
  31. 31.10% of 370 =
  32. 32.10% of 380 =
  33. 33.25% of 260 =
  34. 34.50% of 250 =
  35. 35.15% of 600 =
  36. 36.15% of 290 =
  37. 37.5% of 780 =
  38. 38.10% of 490 =
  39. 39.20% of 400 =
  40. 40.25% of 180 =

Answer key

  1. 73.5
  2. 40
  3. 210
  4. 3.9
  5. 54
  6. 40
  7. 50
  8. 56
  9. 22
  10. 62
  11. 125
  12. 135
  13. 77
  14. 25
  15. 4.3
  16. 166
  17. 102.5
  18. 135
  19. 27.5
  20. 440
  21. 140
  22. 12.5
  23. 128
  24. 83
  25. 32
  26. 166
  27. 63
  28. 36
  29. 39
  30. 1
  31. 37
  32. 38
  33. 65
  34. 125
  35. 90
  36. 43.5
  37. 39
  38. 49
  39. 80
  40. 45

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