Subtract 72/21 from 9/50
1st number: 9/50, 2nd number: 3 9/21
9/50 - 72/21 is -1137/350.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 21 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 50 × 21 = 1050,
9/50 = 9 × 21/50 × 21 = 189/1050 - Likewise, for the 2nd fraction, since 21 × 50 = 1050,
72/21 = 72 × 50/21 × 50 = 3600/1050 - Subtract the two like fractions:
189/1050 - 3600/1050 = 189 - 3600/1050 = -3411/1050 - After reducing the fraction, the answer is -1137/350
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/50-72/21 9/50-72/42 27/50-72/21 9/50-72/63 45/50-72/21 63/50-72/21