Add 21/10 and 56/72
1st number: 2 1/10, 2nd number: 56/72
21/10 + 56/72 is 259/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
21/10 = 21 × 36/10 × 36 = 756/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
56/72 = 56 × 5/72 × 5 = 280/360 - Add the two like fractions:
756/360 + 280/360 = 756 + 280/360 = 1036/360 - 1036/360 simplified gives 259/90
- So, 21/10 + 56/72 = 259/90
In mixed form: 279/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+56/72 21/20+56/72 63/10+56/72 21/30+56/72 21/50+56/72 21/70+56/72