Add 36/18 and 21/45
1st number: 2 0/18, 2nd number: 21/45
36/18 + 21/45 is 37/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
36/18 = 36 × 5/18 × 5 = 180/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
180/90 + 42/90 = 180 + 42/90 = 222/90 - 222/90 simplified gives 37/15
- So, 36/18 + 21/45 = 37/15
In mixed form: 27/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18+21/45 36/18+42/45 36/18+21/90 36/18+63/45 36/54+21/45 36/90+21/45