Answer:

Step-by-step explanation:
Given



Required
Determine the length of a
Solve for c in 



Substitute
and
in 



Solve for 4b


Solve for b


Recall that: 


0.75 = 3/4 = 75%
0.07 = 7/100 = 7%
Answer:
c=17/16
Step-by-step explanation:
3/16=c-7/8
find the common denominator
3/16=c-14/16
add 14/16 on both sides to cancel
c=17/16
1 and 1/2 is the scale factor