Add 25/18 and 9/28, Solve 1 7/18 + 9/28 as a fraction

Add 25/18 and 9/28

1^st number: 1 7/18, 2^nd number: 9/28

25/18 + 9/28 is 431/252.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 18 × 14 = 252,
25/18 = 25 × 14/18 × 14 = 350/252
Likewise, for the 2nd fraction, since 28 × 9 = 252,
9/28 = 9 × 9/28 × 9 = 81/252
Add the two like fractions:
350/252 + 81/252 = 350 + 81/252 = 431/252
So, 25/18 + 9/28 = 431/252
In mixed form: 1179/252

MathStep (Works offline)

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