Add 10/42 and 42/90
10/42 + 42/90 is 74/105.
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,
10/42 = 10 × 15/42 × 15 = 150/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Add the two like fractions:
150/630 + 294/630 = 150 + 294/630 = 444/630 - 444/630 simplified gives 74/105
- So, 10/42 + 42/90 = 74/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+42/90 10/42+84/90 10/84+42/90 30/42+42/90 50/42+42/90 70/42+42/90