Fraction has a value thats equal to 7/8

The fraction that has the same value as 7/8 is 21/24. 
They have the same value because when 21/24 is reduced, it equals 7/8.
Here is how you would reduce 21/24:
21/24 divide both the numerator and denominator by 3. 
21 divided by 3 = 7
24 divided by 3 = 8
:-)

The equation is y=17(7)+600 and it equals 717