Subtract 50/32 from 28/21
1st number: 1 7/21, 2nd number: 1 18/32
28/21 - 50/32 is -11/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 21 × 32 = 672,
28/21 = 28 × 32/21 × 32 = 896/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
50/32 = 50 × 21/32 × 21 = 1050/672 - Subtract the two like fractions:
896/672 - 1050/672 = 896 - 1050/672 = -154/672 - After reducing the fraction, the answer is -11/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-50/32 28/42-50/32 28/21-50/64 84/21-50/32 28/63-50/32 28/21-50/96