Add 42/7 and 18/90
1st number: 6 0/7, 2nd number: 18/90
42/7 + 18/90 is 31/5.
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,
18/90 = 18 × 7/90 × 7 = 126/630 - Add the two like fractions:
3780/630 + 126/630 = 3780 + 126/630 = 3906/630 - 3906/630 simplified gives 31/5
- So, 42/7 + 18/90 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+18/90 42/7+36/90 42/14+18/90 42/7+54/90 42/21+18/90 42/35+18/90 42/49+18/90