Add 45/72 and 21/10
1st number: 45/72, 2nd number: 2 1/10
45/72 + 21/10 is 109/40.
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,
45/72 = 45 × 5/72 × 5 = 225/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
21/10 = 21 × 36/10 × 36 = 756/360 - Add the two like fractions:
225/360 + 756/360 = 225 + 756/360 = 981/360 - 981/360 simplified gives 109/40
- So, 45/72 + 21/10 = 109/40
In mixed form: 229/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+21/10 45/72+42/10 45/72+21/20 45/72+63/10 45/72+21/30 45/72+21/50 45/72+21/70