Add 90/7 and 72/9
1st number: 12 6/7, 2nd number: 8 0/9
90/7 + 72/9 is 146/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
90/7 = 90 × 9/7 × 9 = 810/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
72/9 = 72 × 7/9 × 7 = 504/63 - Add the two like fractions:
810/63 + 504/63 = 810 + 504/63 = 1314/63 - 1314/63 simplified gives 146/7
- So, 90/7 + 72/9 = 146/7
In mixed form: 206/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14+72/9 90/7+72/18 90/21+72/9 90/7+72/27 90/35+72/9 90/7+72/45 90/49+72/9 90/7+72/63