3/5 plus what equals 7/8?

Here we will show you how to calculate "what" in this sentence: "3/5 plus what equals 7/8?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

3/5 + x = 7/8

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 3/5 on both sides like this:

3/5 - 3/5 + x = 7/8 - 3/5

3/5 - 3/5 + x leaves x and 7/8 - 3/5 is 11/40 which means we end up with x = 11/40. Therefore, the answer to "3/5 plus what equals 7/8?" is as follows:

11/40

It is always good to double-check your math to make sure you did it right. When we entered 11/40 for x in this equation 3/5 + x = 7/8, we get the following true equation which means our math is correct.

3/5 + 11/40 = 7/8

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