Add 30/90 and 7/4
1st number: 30/90, 2nd number: 1 3/4
30/90 + 7/4 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
30/90 = 30 × 2/90 × 2 = 60/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
7/4 = 7 × 45/4 × 45 = 315/180 - Add the two like fractions:
60/180 + 315/180 = 60 + 315/180 = 375/180 - 375/180 simplified gives 25/12
- So, 30/90 + 7/4 = 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: 60/90+7/4 30/90+14/4 30/90+7/8 30/90+21/4 30/90+7/12 30/90+35/4 30/90+7/20 30/90+49/4 30/90+7/28