how to add 11/12 + -3 / 8
we have
[tex]\frac{11}{12}+(-\frac{3}{8})=\frac{11}{12}-\frac{3}{8}[/tex]Find the lcm of denominators
12=(2)(2)(3)
8=(2)(2)(2)
so
lcm=(2)(2)(2)(3)=24
Determine an equivalent fractions with the same denominator
Multiply the fraction 11/12 by (2/2)
(11/12)(2/2)=22/24
Multiply the fraction 3/8 by (3/3)
(3/8)(3/3)=9/24
substitute
[tex]\frac{11}{12}-\frac{3}{8}=\frac{22}{24}-\frac{9}{24}=\frac{22-9}{24}=\frac{13}{24}[/tex]