Add 72/60 and 90/18
1st number: 1 12/60, 2nd number: 5 0/18
72/60 + 90/18 is 31/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
72/60 = 72 × 3/60 × 3 = 216/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
90/18 = 90 × 10/18 × 10 = 900/180 - Add the two like fractions:
216/180 + 900/180 = 216 + 900/180 = 1116/180 - 1116/180 simplified gives 31/5
- So, 72/60 + 90/18 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/60+90/36 72/60+90/54