Subtract 21/48 from 42/18
1st number: 2 6/18, 2nd number: 21/48
42/18 - 21/48 is 91/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 48 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 18 × 8 = 144,
42/18 = 42 × 8/18 × 8 = 336/144 - Likewise, for the 2nd fraction, since 48 × 3 = 144,
21/48 = 21 × 3/48 × 3 = 63/144 - Subtract the two like fractions:
336/144 - 63/144 = 336 - 63/144 = 273/144 - After reducing the fraction, the answer is 91/48
- In mixed form: 143/48
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