Subtract 60/30 from 21/49
1st number: 21/49, 2nd number: 2 0/30
21/49 - 60/30 is -11/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 30 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 49 × 30 = 1470,
21/49 = 21 × 30/49 × 30 = 630/1470 - Likewise, for the 2nd fraction, since 30 × 49 = 1470,
60/30 = 60 × 49/30 × 49 = 2940/1470 - Subtract the two like fractions:
630/1470 - 2940/1470 = 630 - 2940/1470 = -2310/1470 - After reducing the fraction, the answer is -11/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49-60/30 21/98-60/30 63/49-60/30 21/49-60/90