Add 5/90 and 3/21
5/90 + 3/21 is 25/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
5/90 = 5 × 7/90 × 7 = 35/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
3/21 = 3 × 30/21 × 30 = 90/630 - Add the two like fractions:
35/630 + 90/630 = 35 + 90/630 = 125/630 - 125/630 simplified gives 25/126
- So, 5/90 + 3/21 = 25/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+3/21 5/90+6/21 5/90+3/42 15/90+3/21 5/90+9/21 5/90+3/63 25/90+3/21 5/90+15/21 35/90+3/21