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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 376 · 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. 1.10% of 150 =
  2. 2.50% of 90 =
  3. 3.50% of 550 =
  4. 4.20% of 360 =
  5. 5.15% of 710 =
  6. 6.20% of 740 =
  7. 7.25% of 140 =
  8. 8.15% of 320 =
  9. 9.15% of 700 =
  10. 10.10% of 510 =
  11. 11.5% of 590 =
  12. 12.20% of 870 =
  13. 13.20% of 220 =
  14. 14.5% of 240 =
  15. 15.15% of 380 =
  16. 16.5% of 680 =
  17. 17.5% of 450 =
  18. 18.15% of 390 =
  19. 19.1% of 420 =
  20. 20.5% of 220 =
  21. 21.1% of 210 =
  22. 22.5% of 730 =
  23. 23.25% of 880 =
  24. 24.5% of 180 =
  25. 25.10% of 750 =
  26. 26.15% of 350 =
  27. 27.15% of 870 =
  28. 28.1% of 70 =
  29. 29.25% of 260 =
  30. 30.10% of 870 =
  31. 31.15% of 160 =
  32. 32.5% of 240 =
  33. 33.5% of 210 =
  34. 34.10% of 670 =
  35. 35.5% of 750 =
  36. 36.50% of 870 =
  37. 37.15% of 370 =
  38. 38.25% of 590 =
  39. 39.10% of 240 =
  40. 40.25% of 640 =

Answer key

  1. 15
  2. 45
  3. 275
  4. 72
  5. 106.5
  6. 148
  7. 35
  8. 48
  9. 105
  10. 51
  11. 29.5
  12. 174
  13. 44
  14. 12
  15. 57
  16. 34
  17. 22.5
  18. 58.5
  19. 4.2
  20. 11
  21. 2.1
  22. 36.5
  23. 220
  24. 9
  25. 75
  26. 52.5
  27. 130.5
  28. 0.7
  29. 65
  30. 87
  31. 24
  32. 12
  33. 10.5
  34. 67
  35. 37.5
  36. 435
  37. 55.5
  38. 147.5
  39. 24
  40. 160

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