Add 20/7 and 60/90
1st number: 2 6/7, 2nd number: 60/90
20/7 + 60/90 is 74/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
20/7 = 20 × 90/7 × 90 = 1800/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Add the two like fractions:
1800/630 + 420/630 = 1800 + 420/630 = 2220/630 - 2220/630 simplified gives 74/21
- So, 20/7 + 60/90 = 74/21
In mixed form: 311/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7+60/90 20/14+60/90 60/7+60/90 20/21+60/90 20/35+60/90 20/49+60/90