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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 732 · 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 780 =
  2. 2.5% of 200 =
  3. 3.10% of 110 =
  4. 4.50% of 870 =
  5. 5.25% of 210 =
  6. 6.10% of 550 =
  7. 7.10% of 620 =
  8. 8.10% of 540 =
  9. 9.5% of 340 =
  10. 10.25% of 710 =
  11. 11.20% of 650 =
  12. 12.10% of 100 =
  13. 13.25% of 720 =
  14. 14.25% of 820 =
  15. 15.50% of 580 =
  16. 16.20% of 180 =
  17. 17.1% of 130 =
  18. 18.1% of 460 =
  19. 19.10% of 50 =
  20. 20.50% of 340 =
  21. 21.1% of 900 =
  22. 22.1% of 720 =
  23. 23.1% of 770 =
  24. 24.20% of 320 =
  25. 25.10% of 330 =
  26. 26.1% of 170 =
  27. 27.1% of 100 =
  28. 28.20% of 270 =
  29. 29.25% of 40 =
  30. 30.25% of 390 =
  31. 31.20% of 900 =
  32. 32.20% of 130 =
  33. 33.15% of 220 =
  34. 34.50% of 160 =
  35. 35.10% of 630 =
  36. 36.10% of 40 =
  37. 37.10% of 280 =
  38. 38.25% of 220 =
  39. 39.1% of 220 =
  40. 40.50% of 400 =

Answer key

  1. 117
  2. 10
  3. 11
  4. 435
  5. 52.5
  6. 55
  7. 62
  8. 54
  9. 17
  10. 177.5
  11. 130
  12. 10
  13. 180
  14. 205
  15. 290
  16. 36
  17. 1.3
  18. 4.6
  19. 5
  20. 170
  21. 9
  22. 7.2
  23. 7.7
  24. 64
  25. 33
  26. 1.7
  27. 1
  28. 54
  29. 10
  30. 97.5
  31. 180
  32. 26
  33. 33
  34. 80
  35. 63
  36. 4
  37. 28
  38. 55
  39. 2.2
  40. 200

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