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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 947 · 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 430 =
  2. 2.15% of 470 =
  3. 3.50% of 80 =
  4. 4.50% of 30 =
  5. 5.50% of 60 =
  6. 6.10% of 870 =
  7. 7.20% of 530 =
  8. 8.10% of 240 =
  9. 9.10% of 340 =
  10. 10.20% of 130 =
  11. 11.5% of 210 =
  12. 12.15% of 480 =
  13. 13.1% of 850 =
  14. 14.25% of 700 =
  15. 15.25% of 650 =
  16. 16.25% of 720 =
  17. 17.15% of 600 =
  18. 18.20% of 220 =
  19. 19.20% of 550 =
  20. 20.5% of 620 =
  21. 21.50% of 490 =
  22. 22.50% of 780 =
  23. 23.5% of 100 =
  24. 24.15% of 390 =
  25. 25.10% of 370 =
  26. 26.1% of 260 =
  27. 27.10% of 730 =
  28. 28.1% of 370 =
  29. 29.20% of 890 =
  30. 30.50% of 250 =
  31. 31.10% of 740 =
  32. 32.25% of 410 =
  33. 33.15% of 660 =
  34. 34.5% of 220 =
  35. 35.50% of 420 =
  36. 36.50% of 720 =
  37. 37.25% of 180 =
  38. 38.1% of 160 =
  39. 39.50% of 80 =
  40. 40.1% of 20 =

Answer key

  1. 64.5
  2. 70.5
  3. 40
  4. 15
  5. 30
  6. 87
  7. 106
  8. 24
  9. 34
  10. 26
  11. 10.5
  12. 72
  13. 8.5
  14. 175
  15. 162.5
  16. 180
  17. 90
  18. 44
  19. 110
  20. 31
  21. 245
  22. 390
  23. 5
  24. 58.5
  25. 37
  26. 2.6
  27. 73
  28. 3.7
  29. 178
  30. 125
  31. 74
  32. 102.5
  33. 99
  34. 11
  35. 210
  36. 360
  37. 45
  38. 1.6
  39. 40
  40. 0.2

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