Add 42/70 and 24/28
42/70 + 24/28 is 51/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
24/28 = 24 × 5/28 × 5 = 120/140 - Add the two like fractions:
84/140 + 120/140 = 84 + 120/140 = 204/140 - 204/140 simplified gives 51/35
- So, 42/70 + 24/28 = 51/35
In mixed form: 116/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+24/28 42/70+48/28 42/70+24/56 42/70+72/28 42/70+24/84