My question is: 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? Your thoughts:
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. The final answer: 4.