Add 30/42 and 20/36
30/42 + 20/36 is 80/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
30/42 = 30 × 6/42 × 6 = 180/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
20/36 = 20 × 7/36 × 7 = 140/252 - Add the two like fractions:
180/252 + 140/252 = 180 + 140/252 = 320/252 - 320/252 simplified gives 80/63
- So, 30/42 + 20/36 = 80/63
In mixed form: 117/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+20/36 30/42+40/36 30/84+20/36 30/42+20/72 90/42+20/36 30/42+60/36