Add 75/70 and 28/42
1st number: 1 5/70, 2nd number: 28/42
75/70 + 28/42 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
75/70 = 75 × 3/70 × 3 = 225/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Add the two like fractions:
225/210 + 140/210 = 225 + 140/210 = 365/210 - 365/210 simplified gives 73/42
- So, 75/70 + 28/42 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/70+56/42 75/70+28/84 75/70+84/42