Please answer the following question by reasoning step-by-step.
John had $20. He spent 1/5 of his money on snacks and 3/4 of the remaining money on necessities. How much is left of John's money?

4
John spent $20 x 1 / 5 = $4 on snacks.

He had $20 - $4 = $16 remaining.

He spent $16 x 3 / 4 = $12 on his necessities.

So, John is left with $16 - $12 = $4.

.

Final answer: 4