Add 42/45 and 15/36
42/45 + 15/36 is 27/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
42/45 = 42 × 4/45 × 4 = 168/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
15/36 = 15 × 5/36 × 5 = 75/180 - Add the two like fractions:
168/180 + 75/180 = 168 + 75/180 = 243/180 - 243/180 simplified gives 27/20
- So, 42/45 + 15/36 = 27/20
In mixed form: 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+15/36 42/45+30/36 42/90+15/36 42/45+15/72 42/45+45/36 42/45+75/36