Identify common denominator: Identify the common denominator for the fractions38 and −49. The denominators are 3 and 4, so the least common denominator (LCD) is 12.
Convert to equivalent fractions: Convert each fraction to an equivalent fraction with the LCD as the denominator.For 38, multiply both the numerator and the denominator by 4 to get (3×48×4)=1232.For 4−9, multiply both the numerator and the denominator by 3 to get (4×3−9×3)=12−27.
Add fractions with common denominator: Add the fractions with the common denominator.(1232)+(12−27)=1232−27=125.
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