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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 941 · 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. 1.20% of 370 =
  2. 2.5% of 130 =
  3. 3.25% of 160 =
  4. 4.1% of 60 =
  5. 5.1% of 190 =
  6. 6.25% of 20 =
  7. 7.10% of 200 =
  8. 8.50% of 490 =
  9. 9.1% of 900 =
  10. 10.5% of 540 =
  11. 11.20% of 310 =
  12. 12.5% of 270 =
  13. 13.10% of 790 =
  14. 14.5% of 510 =
  15. 15.5% of 210 =
  16. 16.50% of 550 =
  17. 17.1% of 740 =
  18. 18.10% of 380 =
  19. 19.10% of 340 =
  20. 20.10% of 180 =
  21. 21.10% of 650 =
  22. 22.5% of 630 =
  23. 23.10% of 290 =
  24. 24.1% of 320 =
  25. 25.20% of 880 =
  26. 26.50% of 60 =
  27. 27.5% of 630 =
  28. 28.10% of 810 =
  29. 29.15% of 720 =
  30. 30.50% of 540 =
  31. 31.20% of 740 =
  32. 32.25% of 150 =
  33. 33.25% of 590 =
  34. 34.20% of 470 =
  35. 35.10% of 290 =
  36. 36.50% of 390 =
  37. 37.10% of 710 =
  38. 38.10% of 120 =
  39. 39.5% of 470 =
  40. 40.10% of 340 =

Answer key

  1. 74
  2. 6.5
  3. 40
  4. 0.6
  5. 1.9
  6. 5
  7. 20
  8. 245
  9. 9
  10. 27
  11. 62
  12. 13.5
  13. 79
  14. 25.5
  15. 10.5
  16. 275
  17. 7.4
  18. 38
  19. 34
  20. 18
  21. 65
  22. 31.5
  23. 29
  24. 3.2
  25. 176
  26. 30
  27. 31.5
  28. 81
  29. 108
  30. 270
  31. 148
  32. 37.5
  33. 147.5
  34. 94
  35. 29
  36. 195
  37. 71
  38. 12
  39. 23.5
  40. 34

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