Julia earned money babysitting. She spent 1/4 of the money on lunch. She spent 1/2 of the money on a DVD, and she saved $4. How much money did Jia spend on the DVD?

Answer 1

1/4 + 1/2 = 3/4
so, $4 was 1/4 of what she started with
That means she started with $16, and spent $8 on the DVD.