Add 90/42 and 15/7
1st number: 2 6/42, 2nd number: 2 1/7
90/42 + 15/7 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
90/42 = 90 × 1/42 × 1 = 90/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
15/7 = 15 × 6/7 × 6 = 90/42 - Add the two like fractions:
90/42 + 90/42 = 90 + 90/42 = 180/42 - 180/42 simplified gives 30/7
- So, 90/42 + 15/7 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+30/7 90/84+15/7 90/42+15/14 90/42+45/7 90/42+15/21 90/42+75/7 90/42+15/35 90/42+15/49