A + 1 / 3 (B + 2) and B + 2 / 3 (a + 1)

(b-2)/(a+1)=4
b-2=4(a+1)
3 out of 4 (a plus 1) (b minus 2) plus B minus 3 out of 2 (a plus 1)
=3×4(a+1)/4(a+1) + 3(a+1)/4(a+1)
=3+3/4
=Three and three fourths

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