Add 72/12 and 90/36
1st number: 6 0/12, 2nd number: 2 18/36
72/12 + 90/36 is 17/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
72/12 = 72 × 3/12 × 3 = 216/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
90/36 = 90 × 1/36 × 1 = 90/36 - Add the two like fractions:
216/36 + 90/36 = 216 + 90/36 = 306/36 - 306/36 simplified gives 17/2
- So, 72/12 + 90/36 = 17/2
In mixed form: 81/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/24+90/36 72/12+90/72 72/36+90/36 72/60+90/36 72/84+90/36