Add 28/72 and 42/20
1st number: 28/72, 2nd number: 2 2/20
28/72 + 42/20 is 112/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
42/20 = 42 × 18/20 × 18 = 756/360 - Add the two like fractions:
140/360 + 756/360 = 140 + 756/360 = 896/360 - 896/360 simplified gives 112/45
- So, 28/72 + 42/20 = 112/45
In mixed form: 222/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72+42/20 28/72+84/20 28/72+42/40 84/72+42/20 28/72+42/60