Add 28/72 and 70/50
1st number: 28/72, 2nd number: 1 20/50
28/72 + 70/50 is 161/90.
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,
28/72 = 28 × 25/72 × 25 = 700/1800 - Likewise, for the 2nd fraction, since 50 × 36 = 1800,
70/50 = 70 × 36/50 × 36 = 2520/1800 - Add the two like fractions:
700/1800 + 2520/1800 = 700 + 2520/1800 = 3220/1800 - 3220/1800 simplified gives 161/90
- So, 28/72 + 70/50 = 161/90
In mixed form: 171/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72+70/50 84/72+70/50