Add 45/12 and 1/90
1st number: 3 9/12, 2nd number: 1/90
45/12 + 1/90 is 677/180.
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,
45/12 = 45 × 15/12 × 15 = 675/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
1/90 = 1 × 2/90 × 2 = 2/180 - Add the two like fractions:
675/180 + 2/180 = 675 + 2/180 = 677/180 - So, 45/12 + 1/90 = 677/180
In mixed form: 3137/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+1/90 45/12+2/90 45/24+1/90 45/12+3/90 45/36+1/90 45/12+5/90 45/60+1/90 45/12+7/90 45/84+1/90