Question

How many fractions are equivalent to 4/5

Answer 1

There are an infinite number of them.

-- Think of any number.

-- Multiply  4  by your number.  Write it on top.

-- Multiply  5  by your number.  Write it on the bottom.

-- You have a new fraction that's equivalent to  4/5 .

How many different numbers can you think of ?
That's how many new fractions you can create
that are ALL equivalent to  4/5 .

Answer 2

There is an infinite amount of numbers equivalent to 4/5 such as:
8/10,12/15.16/20,20/25