42/78 as a percentage is 53.85%. This is the simplest way to see how the fraction compares to a whole. The number tells you that the part is just over half of the total.
The fraction 42/78 can also be reduced to 7/13, which still gives the same percentage when you look at it on a scale of 100. Whether you keep it as 42/78 or 7/13, the result stays the same.
Knowing the percentage helps in everyday situations, like figuring out discounts or portions. When you see 53.85%, you instantly understand that the amount is a little more than half of the whole.
