Add 42/70 and 75/12
1st number: 42/70, 2nd number: 6 3/12
42/70 + 75/12 is 137/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
42/70 = 42 × 6/70 × 6 = 252/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
75/12 = 75 × 35/12 × 35 = 2625/420 - Add the two like fractions:
252/420 + 2625/420 = 252 + 2625/420 = 2877/420 - 2877/420 simplified gives 137/20
- So, 42/70 + 75/12 = 137/20
In mixed form: 617/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+75/12 42/70+75/24 42/70+75/36 42/70+75/60 42/70+75/84