Add 27/90 and 90/63
1st number: 27/90, 2nd number: 1 27/63
27/90 + 90/63 is 121/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
90/63 = 90 × 10/63 × 10 = 900/630 - Add the two like fractions:
189/630 + 900/630 = 189 + 900/630 = 1089/630 - 1089/630 simplified gives 121/70
- So, 27/90 + 90/63 = 121/70
In mixed form: 151/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/90+90/63 81/90+90/63