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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 335 · 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 660 =
  2. 2.5% of 880 =
  3. 3.50% of 190 =
  4. 4.5% of 330 =
  5. 5.5% of 810 =
  6. 6.10% of 480 =
  7. 7.1% of 240 =
  8. 8.20% of 50 =
  9. 9.15% of 800 =
  10. 10.15% of 180 =
  11. 11.20% of 630 =
  12. 12.50% of 510 =
  13. 13.1% of 370 =
  14. 14.25% of 320 =
  15. 15.5% of 420 =
  16. 16.5% of 810 =
  17. 17.5% of 730 =
  18. 18.15% of 680 =
  19. 19.20% of 760 =
  20. 20.50% of 490 =
  21. 21.20% of 130 =
  22. 22.1% of 880 =
  23. 23.15% of 230 =
  24. 24.10% of 450 =
  25. 25.1% of 90 =
  26. 26.25% of 170 =
  27. 27.5% of 380 =
  28. 28.15% of 300 =
  29. 29.5% of 230 =
  30. 30.25% of 840 =
  31. 31.5% of 680 =
  32. 32.5% of 310 =
  33. 33.50% of 590 =
  34. 34.10% of 620 =
  35. 35.1% of 590 =
  36. 36.15% of 730 =
  37. 37.5% of 310 =
  38. 38.15% of 350 =
  39. 39.1% of 210 =
  40. 40.20% of 420 =

Answer key

  1. 132
  2. 44
  3. 95
  4. 16.5
  5. 40.5
  6. 48
  7. 2.4
  8. 10
  9. 120
  10. 27
  11. 126
  12. 255
  13. 3.7
  14. 80
  15. 21
  16. 40.5
  17. 36.5
  18. 102
  19. 152
  20. 245
  21. 26
  22. 8.8
  23. 34.5
  24. 45
  25. 0.9
  26. 42.5
  27. 19
  28. 45
  29. 11.5
  30. 210
  31. 34
  32. 15.5
  33. 295
  34. 62
  35. 5.9
  36. 109.5
  37. 15.5
  38. 52.5
  39. 2.1
  40. 84

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