Add 42/35 and 90/70
1st number: 1 7/35, 2nd number: 1 20/70
42/35 + 90/70 is 87/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 35 × 2 = 70,
42/35 = 42 × 2/35 × 2 = 84/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Add the two like fractions:
84/70 + 90/70 = 84 + 90/70 = 174/70 - 174/70 simplified gives 87/35
- So, 42/35 + 90/70 = 87/35
In mixed form: 217/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35+90/70 42/70+90/70