To write 25/4 as a decimal you have to divide numerator by the denominator of the fraction.
We divide now 25 by 4 what we write down as 25/4 and we get 6.25
And finally we have:
25/4 as a decimal equals <span>6.25</span>
<u>Direct Variation:</u> 

when y = 7: 
14 = 15x

<u>Inverse variation:</u> y*x = k
15 * 2 = k
30 = k
when y = 7: 7 * x = 30

75.3982237 inches squared is the answer, round it to whatever decimal place your asked to.
393/393 - 168/393 = 225/393
Simplify 225/393 by 3 because that is is the fractions GCF
75/131