Add 72/90 and 18/48
72/90 + 18/48 is 47/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
72/90 = 72 × 8/90 × 8 = 576/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
18/48 = 18 × 15/48 × 15 = 270/720 - Add the two like fractions:
576/720 + 270/720 = 576 + 270/720 = 846/720 - 846/720 simplified gives 47/40
- So, 72/90 + 18/48 = 47/40
In mixed form: 17/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/90+36/48 72/90+18/96 72/90+54/48 72/90+90/48