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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 854 · 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 840 =
  2. 2.1% of 30 =
  3. 3.10% of 560 =
  4. 4.15% of 360 =
  5. 5.25% of 290 =
  6. 6.10% of 540 =
  7. 7.20% of 740 =
  8. 8.15% of 390 =
  9. 9.20% of 690 =
  10. 10.50% of 240 =
  11. 11.50% of 610 =
  12. 12.50% of 210 =
  13. 13.15% of 130 =
  14. 14.10% of 250 =
  15. 15.25% of 320 =
  16. 16.25% of 370 =
  17. 17.10% of 630 =
  18. 18.5% of 40 =
  19. 19.20% of 250 =
  20. 20.15% of 770 =
  21. 21.10% of 450 =
  22. 22.20% of 360 =
  23. 23.25% of 140 =
  24. 24.15% of 40 =
  25. 25.50% of 840 =
  26. 26.50% of 260 =
  27. 27.1% of 790 =
  28. 28.5% of 330 =
  29. 29.20% of 490 =
  30. 30.15% of 600 =
  31. 31.25% of 180 =
  32. 32.15% of 850 =
  33. 33.5% of 80 =
  34. 34.20% of 70 =
  35. 35.5% of 360 =
  36. 36.5% of 350 =
  37. 37.50% of 740 =
  38. 38.20% of 800 =
  39. 39.25% of 340 =
  40. 40.1% of 130 =

Answer key

  1. 126
  2. 0.3
  3. 56
  4. 54
  5. 72.5
  6. 54
  7. 148
  8. 58.5
  9. 138
  10. 120
  11. 305
  12. 105
  13. 19.5
  14. 25
  15. 80
  16. 92.5
  17. 63
  18. 2
  19. 50
  20. 115.5
  21. 45
  22. 72
  23. 35
  24. 6
  25. 420
  26. 130
  27. 7.9
  28. 16.5
  29. 98
  30. 90
  31. 45
  32. 127.5
  33. 4
  34. 14
  35. 18
  36. 17.5
  37. 370
  38. 160
  39. 85
  40. 1.3

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