Add 45/72 and 21/50
45/72 + 21/50 is 209/200.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 50 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
45/72 = 45 × 25/72 × 25 = 1125/1800 - Likewise, for the 2nd fraction, since 50 × 36 = 1800,
21/50 = 21 × 36/50 × 36 = 756/1800 - Add the two like fractions:
1125/1800 + 756/1800 = 1125 + 756/1800 = 1881/1800 - 1881/1800 simplified gives 209/200
- So, 45/72 + 21/50 = 209/200
In mixed form: 19/200
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+21/50 45/72+42/50 45/72+63/50