Add 5/90 and 36/21
1st number: 5/90, 2nd number: 1 15/21
5/90 + 36/21 is 223/126.
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,
36/21 = 36 × 30/21 × 30 = 1080/630 - Add the two like fractions:
35/630 + 1080/630 = 35 + 1080/630 = 1115/630 - 1115/630 simplified gives 223/126
- So, 5/90 + 36/21 = 223/126
In mixed form: 197/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/90+36/21 5/90+72/21 5/90+36/42 15/90+36/21 5/90+36/63 25/90+36/21 35/90+36/21