Add 20/90 and 27/7
1st number: 20/90, 2nd number: 3 6/7
20/90 + 27/7 is 257/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
27/7 = 27 × 90/7 × 90 = 2430/630 - Add the two like fractions:
140/630 + 2430/630 = 140 + 2430/630 = 2570/630 - 2570/630 simplified gives 257/63
- So, 20/90 + 27/7 = 257/63
In mixed form: 45/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90+27/7 20/90+54/7 20/90+27/14 60/90+27/7 20/90+81/7 20/90+27/21 20/90+27/35 20/90+27/49