Add 49/60 and 90/21
1st number: 49/60, 2nd number: 4 6/21
49/60 + 90/21 is 2143/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
49/60 = 49 × 7/60 × 7 = 343/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
90/21 = 90 × 20/21 × 20 = 1800/420 - Add the two like fractions:
343/420 + 1800/420 = 343 + 1800/420 = 2143/420 - So, 49/60 + 90/21 = 2143/420
In mixed form: 543/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/60+90/21 49/60+90/42 49/60+90/63