Add 40/28 and 3/18, Solve 1 12/28 + 3/18 as a fraction

Add 40/28 and 3/18

1^st number: 1 12/28, 2^nd number: 3/18

40/28 + 3/18 is 67/42.

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

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
40/28 = 40 × 9/28 × 9 = 360/252
Likewise, for the 2nd fraction, since 18 × 14 = 252,
3/18 = 3 × 14/18 × 14 = 42/252
Add the two like fractions:
360/252 + 42/252 = 360 + 42/252 = 402/252
402/252 simplified gives 67/42
So, 40/28 + 3/18 = 67/42
In mixed form: 125/42

MathStep (Works offline)

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