Add 72/7 and 42/9
1st number: 10 2/7, 2nd number: 4 6/9
72/7 + 42/9 is 314/21.
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,
72/7 = 72 × 9/7 × 9 = 648/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
42/9 = 42 × 7/9 × 7 = 294/63 - Add the two like fractions:
648/63 + 294/63 = 648 + 294/63 = 942/63 - 942/63 simplified gives 314/21
- So, 72/7 + 42/9 = 314/21
In mixed form: 1420/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/7+84/9 72/14+42/9 72/7+42/18 72/21+42/9 72/7+42/27 72/35+42/9 72/7+42/45 72/49+42/9 72/7+42/63