Add 18/28 and 40/63
18/28 + 40/63 is 23/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
18/28 = 18 × 9/28 × 9 = 162/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
40/63 = 40 × 4/63 × 4 = 160/252 - Add the two like fractions:
162/252 + 160/252 = 162 + 160/252 = 322/252 - 322/252 simplified gives 23/18
- So, 18/28 + 40/63 = 23/18
In mixed form: 15/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+40/63 18/28+80/63 18/56+40/63 54/28+40/63 18/84+40/63 90/28+40/63