Add 12/90 and 30/7
1st number: 12/90, 2nd number: 4 2/7
12/90 + 30/7 is 464/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
12/90 = 12 × 7/90 × 7 = 84/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
30/7 = 30 × 90/7 × 90 = 2700/630 - Add the two like fractions:
84/630 + 2700/630 = 84 + 2700/630 = 2784/630 - 2784/630 simplified gives 464/105
- So, 12/90 + 30/7 = 464/105
In mixed form: 444/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+30/7 12/90+60/7 12/90+30/14 36/90+30/7 12/90+90/7 12/90+30/21 60/90+30/7 12/90+30/35 84/90+30/7 12/90+30/49