Subtract 60/9 from 30/21
1st number: 1 9/21, 2nd number: 6 6/9
30/21 - 60/9 is -110/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
60/9 = 60 × 7/9 × 7 = 420/63 - Subtract the two like fractions:
90/63 - 420/63 = 90 - 420/63 = -330/63 - After reducing the fraction, the answer is -110/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-60/9 30/42-60/9 30/21-60/18 90/21-60/9 30/63-60/9 30/21-60/27 30/21-60/45 30/21-60/63