Add 72/7 and 4/90
1st number: 10 2/7, 2nd number: 4/90
72/7 + 4/90 is 3254/315.
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,
72/7 = 72 × 90/7 × 90 = 6480/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Add the two like fractions:
6480/630 + 28/630 = 6480 + 28/630 = 6508/630 - 6508/630 simplified gives 3254/315
- So, 72/7 + 4/90 = 3254/315
In mixed form: 10104/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/7+8/90 72/14+4/90 72/7+12/90 72/21+4/90 72/7+20/90 72/35+4/90 72/7+28/90 72/49+4/90