Add 3/54 and 90/21
1st number: 3/54, 2nd number: 4 6/21
3/54 + 90/21 is 547/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
3/54 = 3 × 7/54 × 7 = 21/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
90/21 = 90 × 18/21 × 18 = 1620/378 - Add the two like fractions:
21/378 + 1620/378 = 21 + 1620/378 = 1641/378 - 1641/378 simplified gives 547/126
- So, 3/54 + 90/21 = 547/126
In mixed form: 443/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/54+90/21 3/54+90/42 9/54+90/21 3/54+90/63 15/54+90/21 21/54+90/21