Add 1/42 and 3/90
1/42 + 3/90 is 2/35.
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,
1/42 = 1 × 15/42 × 15 = 15/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
3/90 = 3 × 7/90 × 7 = 21/630 - Add the two like fractions:
15/630 + 21/630 = 15 + 21/630 = 36/630 - 36/630 simplified gives 2/35
- So, 1/42 + 3/90 = 2/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42+3/90 1/42+6/90 1/84+3/90 3/42+3/90 1/42+9/90 5/42+3/90 1/42+15/90 7/42+3/90 1/42+21/90