What plus 2/3 equals 4/5?

Here we will show you how to calculate "what" in this sentence: "What plus 2/3 equals 4/5?" We start by making this word problem into an algebraic equation where "what" is the variable "x".

x + 2/3 = 4/5

To solve this equation, we want x alone on the left side of the equation so we start by subtracting 2/3 on both sides like this:

x + 2/3 - 2/3 = 4/5 - 2/3

x + 2/3 - 2/3 leaves x and 4/5 - 2/3 is 2/15 which means we end up with x = 2/15. Therefore, the answer to "What plus 2/3 equals 4/5?" is as follows:

2/15

It is always good to double-check your math to make sure you did it right. When we entered 2/15 for x in this equation x + 2/3 = 4/5, we get the following true equation which means our math is correct.

2/15 + 2/3 = 4/5

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