Subtract 9/21 from 18/48
18/48 - 9/21 is -3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 21 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 48 × 7 = 336,
18/48 = 18 × 7/48 × 7 = 126/336 - Likewise, for the 2nd fraction, since 21 × 16 = 336,
9/21 = 9 × 16/21 × 16 = 144/336 - Subtract the two like fractions:
126/336 - 144/336 = 126 - 144/336 = -18/336 - After reducing the fraction, the answer is -3/56
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