Add 75/70 and 42/12
1st number: 1 5/70, 2nd number: 3 6/12
75/70 + 42/12 is 32/7.
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,
75/70 = 75 × 6/70 × 6 = 450/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
42/12 = 42 × 35/12 × 35 = 1470/420 - Add the two like fractions:
450/420 + 1470/420 = 450 + 1470/420 = 1920/420 - 1920/420 simplified gives 32/7
- So, 75/70 + 42/12 = 32/7
In mixed form: 44/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70+84/12 75/70+42/24 75/70+42/36 75/70+42/60 75/70+42/84