Add 72/20 and 50/56
1st number: 3 12/20, 2nd number: 50/56
72/20 + 50/56 is 629/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
72/20 = 72 × 14/20 × 14 = 1008/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
50/56 = 50 × 5/56 × 5 = 250/280 - Add the two like fractions:
1008/280 + 250/280 = 1008 + 250/280 = 1258/280 - 1258/280 simplified gives 629/140
- So, 72/20 + 50/56 = 629/140
In mixed form: 469/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/40+50/56 72/60+50/56