Add 90/20 and 27/36
1st number: 4 10/20, 2nd number: 27/36
90/20 + 27/36 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
27/36 = 27 × 5/36 × 5 = 135/180 - Add the two like fractions:
810/180 + 135/180 = 810 + 135/180 = 945/180 - 945/180 simplified gives 21/4
- So, 90/20 + 27/36 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+54/36 90/40+27/36 90/20+27/72 90/20+81/36 90/60+27/36