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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 665 · 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 270 =
  2. 2.25% of 390 =
  3. 3.15% of 780 =
  4. 4.15% of 600 =
  5. 5.20% of 800 =
  6. 6.10% of 310 =
  7. 7.1% of 40 =
  8. 8.20% of 530 =
  9. 9.25% of 210 =
  10. 10.20% of 670 =
  11. 11.20% of 580 =
  12. 12.10% of 220 =
  13. 13.15% of 730 =
  14. 14.50% of 290 =
  15. 15.20% of 700 =
  16. 16.10% of 500 =
  17. 17.15% of 230 =
  18. 18.50% of 330 =
  19. 19.20% of 570 =
  20. 20.10% of 740 =
  21. 21.50% of 30 =
  22. 22.25% of 870 =
  23. 23.5% of 470 =
  24. 24.25% of 380 =
  25. 25.5% of 70 =
  26. 26.20% of 370 =
  27. 27.1% of 400 =
  28. 28.5% of 230 =
  29. 29.15% of 430 =
  30. 30.50% of 810 =
  31. 31.1% of 450 =
  32. 32.25% of 560 =
  33. 33.10% of 30 =
  34. 34.25% of 820 =
  35. 35.1% of 630 =
  36. 36.25% of 340 =
  37. 37.20% of 550 =
  38. 38.20% of 530 =
  39. 39.50% of 360 =
  40. 40.50% of 380 =

Answer key

  1. 54
  2. 97.5
  3. 117
  4. 90
  5. 160
  6. 31
  7. 0.4
  8. 106
  9. 52.5
  10. 134
  11. 116
  12. 22
  13. 109.5
  14. 145
  15. 140
  16. 50
  17. 34.5
  18. 165
  19. 114
  20. 74
  21. 15
  22. 217.5
  23. 23.5
  24. 95
  25. 3.5
  26. 74
  27. 4
  28. 11.5
  29. 64.5
  30. 405
  31. 4.5
  32. 140
  33. 3
  34. 205
  35. 6.3
  36. 85
  37. 110
  38. 106
  39. 180
  40. 190

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