Add 90/45 and 1/12
1st number: 2 0/45, 2nd number: 1/12
90/45 + 1/12 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
90/45 = 90 × 4/45 × 4 = 360/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
1/12 = 1 × 15/12 × 15 = 15/180 - Add the two like fractions:
360/180 + 15/180 = 360 + 15/180 = 375/180 - 375/180 simplified gives 25/12
- So, 90/45 + 1/12 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+2/12 90/45+1/24 90/45+3/12 90/45+1/36 90/45+5/12 90/45+1/60 90/45+7/12 90/45+1/84