Add 80/30 and 60/72
1st number: 2 20/30, 2nd number: 60/72
80/30 + 60/72 is 7/2.
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,
80/30 = 80 × 12/30 × 12 = 960/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
60/72 = 60 × 5/72 × 5 = 300/360 - Add the two like fractions:
960/360 + 300/360 = 960 + 300/360 = 1260/360 - 1260/360 simplified gives 7/2
- So, 80/30 + 60/72 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/60+60/72 80/90+60/72