Add 4/90 and 45/12
1st number: 4/90, 2nd number: 3 9/12
4/90 + 45/12 is 683/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
4/90 = 4 × 2/90 × 2 = 8/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
45/12 = 45 × 15/12 × 15 = 675/180 - Add the two like fractions:
8/180 + 675/180 = 8 + 675/180 = 683/180 - So, 4/90 + 45/12 = 683/180
In mixed form: 3143/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+45/12 4/90+90/12 4/90+45/24 12/90+45/12 4/90+45/36 20/90+45/12 4/90+45/60 28/90+45/12 4/90+45/84