Question

Out of every $100 that Judy earns at her part time job, she saves $25 for college. The amount she saves is directly proportional to the amount she earns. If she earns #3,880 in one year, how much will she save for college?

Answer 1

the answer is 970 because how much she has/how much she saves=3,880/100 which equals 25/970

Answer 2

$100 - $25 = her profit or $75.
                                           
3,880 divided by 100 is $38.8

38.8 * 75 = $2910

3,880 - 2910 = 970

Judy saved $970 for college.