Add 6/42 and 18/90
6/42 + 18/90 is 12/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
6/42 = 6 × 15/42 × 15 = 90/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Add the two like fractions:
90/630 + 126/630 = 90 + 126/630 = 216/630 - 216/630 simplified gives 12/35
- So, 6/42 + 18/90 = 12/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42+18/90 6/42+36/90 6/84+18/90 18/42+18/90 6/42+54/90 30/42+18/90