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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 918 · 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. 1.25% of 320 =
  2. 2.5% of 730 =
  3. 3.10% of 140 =
  4. 4.50% of 700 =
  5. 5.20% of 570 =
  6. 6.5% of 830 =
  7. 7.20% of 520 =
  8. 8.25% of 840 =
  9. 9.50% of 440 =
  10. 10.5% of 290 =
  11. 11.20% of 620 =
  12. 12.20% of 100 =
  13. 13.1% of 550 =
  14. 14.5% of 660 =
  15. 15.10% of 430 =
  16. 16.50% of 230 =
  17. 17.15% of 250 =
  18. 18.1% of 80 =
  19. 19.1% of 610 =
  20. 20.1% of 450 =
  21. 21.5% of 310 =
  22. 22.15% of 410 =
  23. 23.50% of 380 =
  24. 24.50% of 520 =
  25. 25.10% of 160 =
  26. 26.15% of 140 =
  27. 27.1% of 690 =
  28. 28.5% of 360 =
  29. 29.10% of 550 =
  30. 30.1% of 110 =
  31. 31.25% of 350 =
  32. 32.15% of 350 =
  33. 33.1% of 500 =
  34. 34.10% of 860 =
  35. 35.1% of 860 =
  36. 36.15% of 780 =
  37. 37.5% of 180 =
  38. 38.15% of 190 =
  39. 39.20% of 240 =
  40. 40.50% of 250 =

Answer key

  1. 80
  2. 36.5
  3. 14
  4. 350
  5. 114
  6. 41.5
  7. 104
  8. 210
  9. 220
  10. 14.5
  11. 124
  12. 20
  13. 5.5
  14. 33
  15. 43
  16. 115
  17. 37.5
  18. 0.8
  19. 6.1
  20. 4.5
  21. 15.5
  22. 61.5
  23. 190
  24. 260
  25. 16
  26. 21
  27. 6.9
  28. 18
  29. 55
  30. 1.1
  31. 87.5
  32. 52.5
  33. 5
  34. 86
  35. 8.6
  36. 117
  37. 9
  38. 28.5
  39. 48
  40. 125

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