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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 659 · 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. 1.5% of 160 =
  2. 2.25% of 410 =
  3. 3.20% of 850 =
  4. 4.1% of 220 =
  5. 5.1% of 130 =
  6. 6.20% of 320 =
  7. 7.15% of 210 =
  8. 8.10% of 550 =
  9. 9.5% of 80 =
  10. 10.1% of 430 =
  11. 11.1% of 410 =
  12. 12.20% of 370 =
  13. 13.50% of 230 =
  14. 14.50% of 70 =
  15. 15.5% of 390 =
  16. 16.50% of 360 =
  17. 17.20% of 30 =
  18. 18.50% of 300 =
  19. 19.10% of 170 =
  20. 20.10% of 610 =
  21. 21.15% of 530 =
  22. 22.20% of 370 =
  23. 23.20% of 710 =
  24. 24.15% of 510 =
  25. 25.5% of 160 =
  26. 26.10% of 270 =
  27. 27.10% of 560 =
  28. 28.15% of 770 =
  29. 29.20% of 370 =
  30. 30.10% of 680 =
  31. 31.50% of 80 =
  32. 32.15% of 800 =
  33. 33.10% of 190 =
  34. 34.50% of 410 =
  35. 35.1% of 30 =
  36. 36.25% of 20 =
  37. 37.10% of 250 =
  38. 38.15% of 480 =
  39. 39.5% of 620 =
  40. 40.5% of 50 =

Answer key

  1. 8
  2. 102.5
  3. 170
  4. 2.2
  5. 1.3
  6. 64
  7. 31.5
  8. 55
  9. 4
  10. 4.3
  11. 4.1
  12. 74
  13. 115
  14. 35
  15. 19.5
  16. 180
  17. 6
  18. 150
  19. 17
  20. 61
  21. 79.5
  22. 74
  23. 142
  24. 76.5
  25. 8
  26. 27
  27. 56
  28. 115.5
  29. 74
  30. 68
  31. 40
  32. 120
  33. 19
  34. 205
  35. 0.3
  36. 5
  37. 25
  38. 72
  39. 31
  40. 2.5

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