Subtract 28/7 from 42/63
1st number: 42/63, 2nd number: 4 0/7
42/63 - 28/7 is -10/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
42/63 = 42 × 1/63 × 1 = 42/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
28/7 = 28 × 9/7 × 9 = 252/63 - Subtract the two like fractions:
42/63 - 252/63 = 42 - 252/63 = -210/63 - After reducing the fraction, the answer is -10/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-28/7 42/63-56/7 42/63-28/14 42/63-84/7 42/63-28/21 42/63-28/35 42/63-28/49