Add 84/72 and 21/10
1st number: 1 12/72, 2nd number: 2 1/10
84/72 + 21/10 is 49/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
84/72 = 84 × 5/72 × 5 = 420/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
21/10 = 21 × 36/10 × 36 = 756/360 - Add the two like fractions:
420/360 + 756/360 = 420 + 756/360 = 1176/360 - 1176/360 simplified gives 49/15
- So, 84/72 + 21/10 = 49/15
In mixed form: 34/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+42/10 84/72+21/20 84/72+63/10 84/72+21/30 84/72+21/50 84/72+21/70