Add 81/12 and 24/90
1st number: 6 9/12, 2nd number: 24/90
81/12 + 24/90 is 421/60.
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,
81/12 = 81 × 15/12 × 15 = 1215/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
24/90 = 24 × 2/90 × 2 = 48/180 - Add the two like fractions:
1215/180 + 48/180 = 1215 + 48/180 = 1263/180 - 1263/180 simplified gives 421/60
- So, 81/12 + 24/90 = 421/60
In mixed form: 71/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+48/90 81/24+24/90 81/12+72/90 81/36+24/90 81/60+24/90 81/84+24/90