Add 30/7 and 30/90
1st number: 4 2/7, 2nd number: 30/90
30/7 + 30/90 is 97/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
30/7 = 30 × 90/7 × 90 = 2700/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
30/90 = 30 × 7/90 × 7 = 210/630 - Add the two like fractions:
2700/630 + 210/630 = 2700 + 210/630 = 2910/630 - 2910/630 simplified gives 97/21
- So, 30/7 + 30/90 = 97/21
In mixed form: 413/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7+30/90 30/7+60/90 30/14+30/90 90/7+30/90 30/21+30/90 30/35+30/90 30/49+30/90