Add 72/12 and 9/90
1st number: 6 0/12, 2nd number: 9/90
72/12 + 9/90 is 61/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
72/12 = 72 × 15/12 × 15 = 1080/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
9/90 = 9 × 2/90 × 2 = 18/180 - Add the two like fractions:
1080/180 + 18/180 = 1080 + 18/180 = 1098/180 - 1098/180 simplified gives 61/10
- So, 72/12 + 9/90 = 61/10
In mixed form: 61/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+18/90 72/24+9/90 72/12+27/90 72/36+9/90 72/12+45/90 72/60+9/90 72/12+63/90 72/84+9/90