Subtract 42/30 from 21/48
1st number: 21/48, 2nd number: 1 12/30
21/48 - 42/30 is -77/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
21/48 = 21 × 5/48 × 5 = 105/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
42/30 = 42 × 8/30 × 8 = 336/240 - Subtract the two like fractions:
105/240 - 336/240 = 105 - 336/240 = -231/240 - After reducing the fraction, the answer is -77/80
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