Add 9/18 and 25/7, Solve 9/18 + 3 4/7 as a fraction

Add 9/18 and 25/7

1^st number: 9/18, 2^nd number: 3 4/7

9/18 + 25/7 is 57/14.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
9/18 = 9 × 7/18 × 7 = 63/126
Likewise, for the 2nd fraction, since 7 × 18 = 126,
25/7 = 25 × 18/7 × 18 = 450/126
Add the two like fractions:
63/126 + 450/126 = 63 + 450/126 = 513/126
513/126 simplified gives 57/14
So, 9/18 + 25/7 = 57/14
In mixed form: 41/14

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad