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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 62 · 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 210 =
  2. 2.50% of 530 =
  3. 3.5% of 480 =
  4. 4.5% of 450 =
  5. 5.15% of 370 =
  6. 6.1% of 50 =
  7. 7.50% of 250 =
  8. 8.50% of 890 =
  9. 9.25% of 550 =
  10. 10.20% of 760 =
  11. 11.10% of 20 =
  12. 12.50% of 350 =
  13. 13.10% of 470 =
  14. 14.20% of 560 =
  15. 15.10% of 460 =
  16. 16.10% of 230 =
  17. 17.15% of 200 =
  18. 18.15% of 800 =
  19. 19.10% of 220 =
  20. 20.10% of 750 =
  21. 21.50% of 80 =
  22. 22.5% of 120 =
  23. 23.15% of 260 =
  24. 24.25% of 480 =
  25. 25.20% of 240 =
  26. 26.1% of 170 =
  27. 27.20% of 590 =
  28. 28.50% of 230 =
  29. 29.20% of 130 =
  30. 30.10% of 80 =
  31. 31.25% of 570 =
  32. 32.15% of 560 =
  33. 33.1% of 480 =
  34. 34.50% of 30 =
  35. 35.5% of 300 =
  36. 36.1% of 190 =
  37. 37.15% of 200 =
  38. 38.10% of 270 =
  39. 39.20% of 490 =
  40. 40.25% of 200 =

Answer key

  1. 21
  2. 265
  3. 24
  4. 22.5
  5. 55.5
  6. 0.5
  7. 125
  8. 445
  9. 137.5
  10. 152
  11. 2
  12. 175
  13. 47
  14. 112
  15. 46
  16. 23
  17. 30
  18. 120
  19. 22
  20. 75
  21. 40
  22. 6
  23. 39
  24. 120
  25. 48
  26. 1.7
  27. 118
  28. 115
  29. 26
  30. 8
  31. 142.5
  32. 84
  33. 4.8
  34. 15
  35. 15
  36. 1.9
  37. 30
  38. 27
  39. 98
  40. 50

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