Add 20/10 and 21/72
1st number: 2 0/10, 2nd number: 21/72
20/10 + 21/72 is 55/24.
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,
20/10 = 20 × 36/10 × 36 = 720/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
720/360 + 105/360 = 720 + 105/360 = 825/360 - 825/360 simplified gives 55/24
- So, 20/10 + 21/72 = 55/24
In mixed form: 27/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10+21/72 20/10+42/72 60/10+21/72 20/10+63/72 20/30+21/72 20/50+21/72 20/70+21/72