Subtract 9/72 from 21/48
21/48 - 9/72 is 5/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 72 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 48 × 3 = 144,
21/48 = 21 × 3/48 × 3 = 63/144 - Likewise, for the 2nd fraction, since 72 × 2 = 144,
9/72 = 9 × 2/72 × 2 = 18/144 - Subtract the two like fractions:
63/144 - 18/144 = 63 - 18/144 = 45/144 - After reducing the fraction, the answer is 5/16
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