Add 30/48 and 90/45
1st number: 30/48, 2nd number: 2 0/45
30/48 + 90/45 is 21/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
30/48 = 30 × 15/48 × 15 = 450/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
90/45 = 90 × 16/45 × 16 = 1440/720 - Add the two like fractions:
450/720 + 1440/720 = 450 + 1440/720 = 1890/720 - 1890/720 simplified gives 21/8
- So, 30/48 + 90/45 = 21/8
In mixed form: 25/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/48+90/45 30/96+90/45 90/48+90/45