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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 615 · 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 440 =
  2. 2.20% of 650 =
  3. 3.20% of 870 =
  4. 4.15% of 170 =
  5. 5.50% of 620 =
  6. 6.50% of 780 =
  7. 7.1% of 140 =
  8. 8.20% of 130 =
  9. 9.20% of 280 =
  10. 10.1% of 470 =
  11. 11.5% of 830 =
  12. 12.10% of 210 =
  13. 13.15% of 820 =
  14. 14.10% of 50 =
  15. 15.1% of 740 =
  16. 16.5% of 60 =
  17. 17.1% of 860 =
  18. 18.1% of 160 =
  19. 19.15% of 300 =
  20. 20.15% of 820 =
  21. 21.1% of 640 =
  22. 22.15% of 30 =
  23. 23.5% of 450 =
  24. 24.5% of 460 =
  25. 25.20% of 740 =
  26. 26.25% of 680 =
  27. 27.15% of 880 =
  28. 28.20% of 100 =
  29. 29.1% of 110 =
  30. 30.10% of 80 =
  31. 31.15% of 770 =
  32. 32.15% of 100 =
  33. 33.15% of 700 =
  34. 34.25% of 680 =
  35. 35.10% of 150 =
  36. 36.25% of 100 =
  37. 37.10% of 570 =
  38. 38.10% of 880 =
  39. 39.50% of 780 =
  40. 40.10% of 450 =

Answer key

  1. 88
  2. 130
  3. 174
  4. 25.5
  5. 310
  6. 390
  7. 1.4
  8. 26
  9. 56
  10. 4.7
  11. 41.5
  12. 21
  13. 123
  14. 5
  15. 7.4
  16. 3
  17. 8.6
  18. 1.6
  19. 45
  20. 123
  21. 6.4
  22. 4.5
  23. 22.5
  24. 23
  25. 148
  26. 170
  27. 132
  28. 20
  29. 1.1
  30. 8
  31. 115.5
  32. 15
  33. 105
  34. 170
  35. 15
  36. 25
  37. 57
  38. 88
  39. 390
  40. 45

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