Subtract 48/42 from 21/35
1st number: 21/35, 2nd number: 1 6/42
21/35 - 48/42 is -19/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
48/42 = 48 × 5/42 × 5 = 240/210 - Subtract the two like fractions:
126/210 - 240/210 = 126 - 240/210 = -114/210 - After reducing the fraction, the answer is -19/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-48/42 21/35-96/42 21/70-48/42 21/35-48/84 63/35-48/42