Becky d james have a total of 4 2/8 feet of yarn. becky has 1 5/8 feet of yarn. how many feet of yarn does james have?

Let
x> feet of yarn of Becky
y> feet of yarn of James

we know that
4 2/8> 4 1/4> (4*4+1)/4> 17/4
1 5/8> (1*8+5)/8> 13/5
x+y=4 2/8> x+y=17/4> equation 1
x=1 5/8> x=13/5> equation 2
substitute 2 in 1
[13/5]+y=17/4> y=(17/4)-(13/5)> y=[5*17-4*13]/20
y=(85-52)/20> y=33/20> y=1.65> y=1 65/100> y=1 13/20

the answer is
james have 1 13/20 ft of yarn