Add 36/21 and 56/80
1st number: 1 15/21, 2nd number: 56/80
36/21 + 56/80 is 169/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
36/21 = 36 × 80/21 × 80 = 2880/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
56/80 = 56 × 21/80 × 21 = 1176/1680 - Add the two like fractions:
2880/1680 + 1176/1680 = 2880 + 1176/1680 = 4056/1680 - 4056/1680 simplified gives 169/70
- So, 36/21 + 56/80 = 169/70
In mixed form: 229/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+56/80 36/42+56/80 36/63+56/80