Add 20/42 and 49/63
20/42 + 49/63 is 79/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
49/63 = 49 × 2/63 × 2 = 98/126 - Add the two like fractions:
60/126 + 98/126 = 60 + 98/126 = 158/126 - 158/126 simplified gives 79/63
- So, 20/42 + 49/63 = 79/63
In mixed form: 116/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+49/63 20/42+98/63 20/84+49/63 60/42+49/63