Subtract 21/5 from 54/42
1st number: 1 12/42, 2nd number: 4 1/5
54/42 - 21/5 is -102/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
21/5 = 21 × 42/5 × 42 = 882/210 - Subtract the two like fractions:
270/210 - 882/210 = 270 - 882/210 = -612/210 - After reducing the fraction, the answer is -102/35
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