Add 12/7 and 72/63
1st number: 1 5/7, 2nd number: 1 9/63
12/7 + 72/63 is 20/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
12/7 = 12 × 9/7 × 9 = 108/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
72/63 = 72 × 1/63 × 1 = 72/63 - Add the two like fractions:
108/63 + 72/63 = 108 + 72/63 = 180/63 - 180/63 simplified gives 20/7
- So, 12/7 + 72/63 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7+72/63 12/14+72/63 36/7+72/63 12/21+72/63 60/7+72/63 12/35+72/63 84/7+72/63 12/49+72/63