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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 324 · 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 420 =
  2. 2.20% of 850 =
  3. 3.1% of 840 =
  4. 4.15% of 880 =
  5. 5.15% of 730 =
  6. 6.10% of 480 =
  7. 7.1% of 20 =
  8. 8.15% of 570 =
  9. 9.25% of 730 =
  10. 10.20% of 30 =
  11. 11.5% of 240 =
  12. 12.20% of 540 =
  13. 13.10% of 480 =
  14. 14.20% of 490 =
  15. 15.5% of 880 =
  16. 16.1% of 500 =
  17. 17.50% of 740 =
  18. 18.5% of 290 =
  19. 19.50% of 540 =
  20. 20.5% of 820 =
  21. 21.20% of 460 =
  22. 22.50% of 890 =
  23. 23.5% of 40 =
  24. 24.20% of 800 =
  25. 25.50% of 650 =
  26. 26.15% of 530 =
  27. 27.15% of 340 =
  28. 28.1% of 410 =
  29. 29.25% of 180 =
  30. 30.50% of 630 =
  31. 31.20% of 180 =
  32. 32.50% of 90 =
  33. 33.20% of 530 =
  34. 34.1% of 220 =
  35. 35.10% of 350 =
  36. 36.20% of 550 =
  37. 37.5% of 150 =
  38. 38.5% of 270 =
  39. 39.20% of 370 =
  40. 40.10% of 550 =

Answer key

  1. 63
  2. 170
  3. 8.4
  4. 132
  5. 109.5
  6. 48
  7. 0.2
  8. 85.5
  9. 182.5
  10. 6
  11. 12
  12. 108
  13. 48
  14. 98
  15. 44
  16. 5
  17. 370
  18. 14.5
  19. 270
  20. 41
  21. 92
  22. 445
  23. 2
  24. 160
  25. 325
  26. 79.5
  27. 51
  28. 4.1
  29. 45
  30. 315
  31. 36
  32. 45
  33. 106
  34. 2.2
  35. 35
  36. 110
  37. 7.5
  38. 13.5
  39. 74
  40. 55

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