Add 2/7 and 80/90
2/7 + 80/90 is 74/63.
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,
2/7 = 2 × 90/7 × 90 = 180/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
80/90 = 80 × 7/90 × 7 = 560/630 - Add the two like fractions:
180/630 + 560/630 = 180 + 560/630 = 740/630 - 740/630 simplified gives 74/63
- So, 2/7 + 80/90 = 74/63
In mixed form: 111/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7+80/90 2/14+80/90 6/7+80/90 2/21+80/90 10/7+80/90 2/35+80/90 14/7+80/90 2/49+80/90