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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 639 · 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 50 =
  2. 2.10% of 550 =
  3. 3.10% of 840 =
  4. 4.15% of 430 =
  5. 5.20% of 240 =
  6. 6.10% of 50 =
  7. 7.20% of 440 =
  8. 8.15% of 380 =
  9. 9.10% of 550 =
  10. 10.25% of 220 =
  11. 11.25% of 320 =
  12. 12.10% of 190 =
  13. 13.1% of 860 =
  14. 14.10% of 130 =
  15. 15.5% of 430 =
  16. 16.5% of 400 =
  17. 17.15% of 780 =
  18. 18.10% of 50 =
  19. 19.50% of 480 =
  20. 20.15% of 290 =
  21. 21.25% of 60 =
  22. 22.1% of 340 =
  23. 23.5% of 160 =
  24. 24.5% of 20 =
  25. 25.10% of 410 =
  26. 26.1% of 760 =
  27. 27.50% of 100 =
  28. 28.1% of 450 =
  29. 29.1% of 110 =
  30. 30.15% of 780 =
  31. 31.50% of 900 =
  32. 32.25% of 130 =
  33. 33.15% of 520 =
  34. 34.1% of 350 =
  35. 35.20% of 630 =
  36. 36.1% of 800 =
  37. 37.1% of 320 =
  38. 38.1% of 800 =
  39. 39.10% of 680 =
  40. 40.1% of 900 =

Answer key

  1. 25
  2. 55
  3. 84
  4. 64.5
  5. 48
  6. 5
  7. 88
  8. 57
  9. 55
  10. 55
  11. 80
  12. 19
  13. 8.6
  14. 13
  15. 21.5
  16. 20
  17. 117
  18. 5
  19. 240
  20. 43.5
  21. 15
  22. 3.4
  23. 8
  24. 1
  25. 41
  26. 7.6
  27. 50
  28. 4.5
  29. 1.1
  30. 117
  31. 450
  32. 32.5
  33. 78
  34. 3.5
  35. 126
  36. 8
  37. 3.2
  38. 8
  39. 68
  40. 9

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