← Percentages in seconds lesson New set →

Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 73 · 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 720 =
  3. 3.10% of 780 =
  4. 4.15% of 70 =
  5. 5.50% of 450 =
  6. 6.5% of 860 =
  7. 7.5% of 620 =
  8. 8.5% of 880 =
  9. 9.20% of 430 =
  10. 10.25% of 720 =
  11. 11.10% of 280 =
  12. 12.50% of 200 =
  13. 13.50% of 330 =
  14. 14.5% of 520 =
  15. 15.5% of 80 =
  16. 16.25% of 130 =
  17. 17.5% of 630 =
  18. 18.1% of 30 =
  19. 19.5% of 470 =
  20. 20.50% of 270 =
  21. 21.25% of 240 =
  22. 22.10% of 220 =
  23. 23.10% of 310 =
  24. 24.1% of 560 =
  25. 25.25% of 150 =
  26. 26.5% of 840 =
  27. 27.1% of 100 =
  28. 28.15% of 680 =
  29. 29.15% of 190 =
  30. 30.20% of 390 =
  31. 31.50% of 460 =
  32. 32.15% of 830 =
  33. 33.25% of 780 =
  34. 34.10% of 450 =
  35. 35.50% of 340 =
  36. 36.5% of 420 =
  37. 37.15% of 30 =
  38. 38.20% of 20 =
  39. 39.25% of 630 =
  40. 40.10% of 60 =

Answer key

  1. 21
  2. 360
  3. 78
  4. 10.5
  5. 225
  6. 43
  7. 31
  8. 44
  9. 86
  10. 180
  11. 28
  12. 100
  13. 165
  14. 26
  15. 4
  16. 32.5
  17. 31.5
  18. 0.3
  19. 23.5
  20. 135
  21. 60
  22. 22
  23. 31
  24. 5.6
  25. 37.5
  26. 42
  27. 1
  28. 102
  29. 28.5
  30. 78
  31. 230
  32. 124.5
  33. 195
  34. 45
  35. 170
  36. 21
  37. 4.5
  38. 4
  39. 157.5
  40. 6

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths