Add 72/42 and 36/80
1st number: 1 30/42, 2nd number: 36/80
72/42 + 36/80 is 303/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
72/42 = 72 × 40/42 × 40 = 2880/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
36/80 = 36 × 21/80 × 21 = 756/1680 - Add the two like fractions:
2880/1680 + 756/1680 = 2880 + 756/1680 = 3636/1680 - 3636/1680 simplified gives 303/140
- So, 72/42 + 36/80 = 303/140
In mixed form: 223/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+72/80 72/84+36/80