Add 42/7 and 28/90
1st number: 6 0/7, 2nd number: 28/90
42/7 + 28/90 is 284/45.
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,
42/7 = 42 × 90/7 × 90 = 3780/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
28/90 = 28 × 7/90 × 7 = 196/630 - Add the two like fractions:
3780/630 + 196/630 = 3780 + 196/630 = 3976/630 - 3976/630 simplified gives 284/45
- So, 42/7 + 28/90 = 284/45
In mixed form: 614/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+28/90 42/7+56/90 42/14+28/90 42/7+84/90 42/21+28/90 42/35+28/90 42/49+28/90