Add 28/30 and 56/72
28/30 + 56/72 is 77/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
28/30 = 28 × 12/30 × 12 = 336/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
56/72 = 56 × 5/72 × 5 = 280/360 - Add the two like fractions:
336/360 + 280/360 = 336 + 280/360 = 616/360 - 616/360 simplified gives 77/45
- So, 28/30 + 56/72 = 77/45
In mixed form: 132/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+56/72 28/60+56/72 84/30+56/72 28/90+56/72