Answer:
f= .75 or 3/4
Step-by-step explanation:
13/4 = 3 1/4 or 3.25
4-3.25= .75
Or
3/4
f = 3/4
f+(13/4)= 4
subtract (13/4) from both sides
⇒f + (13/4)- (13/4) = 4 -(13/4)
⇒f =(16-13) /4
∴f = 3/4
