40/70 expressed as a percentage is 57.14%. This rounded figure shows how much of a whole the fraction represents when you think in terms of percent.
The fraction 40/70 can also be simplified to 4/7, which still gives the same percentage. Seeing it as a percent makes it easier to compare with other numbers that are already in percent form.
Whenever you need to work with 40/70 in everyday situations—like calculating discounts or success rates—just use 57.14% and you’ll have an accurate, quick reference.