Add 90/72 and 60/45
1st number: 1 18/72, 2nd number: 1 15/45
90/72 + 60/45 is 31/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 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 45 × 8 = 360,
60/45 = 60 × 8/45 × 8 = 480/360 - Add the two like fractions:
450/360 + 480/360 = 450 + 480/360 = 930/360 - 930/360 simplified gives 31/12
- So, 90/72 + 60/45 = 31/12
In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+60/90