Add 42/7 and 12/90
1st number: 6 0/7, 2nd number: 12/90
42/7 + 12/90 is 92/15.
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,
12/90 = 12 × 7/90 × 7 = 84/630 - Add the two like fractions:
3780/630 + 84/630 = 3780 + 84/630 = 3864/630 - 3864/630 simplified gives 92/15
- So, 42/7 + 12/90 = 92/15
In mixed form: 62/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+12/90 42/7+24/90 42/14+12/90 42/7+36/90 42/21+12/90 42/7+60/90 42/35+12/90 42/7+84/90 42/49+12/90