Add 90/72 and 18/60
1st number: 1 18/72, 2nd number: 18/60
90/72 + 18/60 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 60 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Likewise, for the 2nd fraction, since 60 × 6 = 360,
18/60 = 18 × 6/60 × 6 = 108/360 - Add the two like fractions:
450/360 + 108/360 = 450 + 108/360 = 558/360 - 558/360 simplified gives 31/20
- So, 90/72 + 18/60 = 31/20
In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+36/60 90/72+54/60 90/72+90/60