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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 939 · 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. 1.50% of 740 =
  2. 2.25% of 180 =
  3. 3.10% of 400 =
  4. 4.15% of 70 =
  5. 5.50% of 240 =
  6. 6.5% of 530 =
  7. 7.50% of 850 =
  8. 8.5% of 60 =
  9. 9.5% of 180 =
  10. 10.1% of 350 =
  11. 11.10% of 380 =
  12. 12.15% of 40 =
  13. 13.5% of 220 =
  14. 14.50% of 780 =
  15. 15.50% of 630 =
  16. 16.25% of 100 =
  17. 17.20% of 530 =
  18. 18.50% of 820 =
  19. 19.15% of 450 =
  20. 20.5% of 310 =
  21. 21.5% of 300 =
  22. 22.15% of 780 =
  23. 23.50% of 560 =
  24. 24.25% of 740 =
  25. 25.25% of 300 =
  26. 26.10% of 900 =
  27. 27.20% of 520 =
  28. 28.10% of 550 =
  29. 29.10% of 280 =
  30. 30.10% of 120 =
  31. 31.1% of 280 =
  32. 32.20% of 220 =
  33. 33.20% of 570 =
  34. 34.1% of 30 =
  35. 35.20% of 410 =
  36. 36.10% of 180 =
  37. 37.15% of 450 =
  38. 38.5% of 430 =
  39. 39.1% of 40 =
  40. 40.1% of 370 =

Answer key

  1. 370
  2. 45
  3. 40
  4. 10.5
  5. 120
  6. 26.5
  7. 425
  8. 3
  9. 9
  10. 3.5
  11. 38
  12. 6
  13. 11
  14. 390
  15. 315
  16. 25
  17. 106
  18. 410
  19. 67.5
  20. 15.5
  21. 15
  22. 117
  23. 280
  24. 185
  25. 75
  26. 90
  27. 104
  28. 55
  29. 28
  30. 12
  31. 2.8
  32. 44
  33. 114
  34. 0.3
  35. 82
  36. 18
  37. 67.5
  38. 21.5
  39. 0.4
  40. 3.7

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