Add 90/21 and 5/90
1st number: 4 6/21, 2nd number: 5/90
90/21 + 5/90 is 547/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
90/21 = 90 × 30/21 × 30 = 2700/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Add the two like fractions:
2700/630 + 35/630 = 2700 + 35/630 = 2735/630 - 2735/630 simplified gives 547/126
- So, 90/21 + 5/90 = 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: 90/21+10/90 90/42+5/90 90/21+15/90 90/63+5/90 90/21+25/90 90/21+35/90