Add 90/70 and 28/6
1st number: 1 20/70, 2nd number: 4 4/6
90/70 + 28/6 is 125/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 6 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Likewise, for the 2nd fraction, since 6 × 35 = 210,
28/6 = 28 × 35/6 × 35 = 980/210 - Add the two like fractions:
270/210 + 980/210 = 270 + 980/210 = 1250/210 - 1250/210 simplified gives 125/21
- So, 90/70 + 28/6 = 125/21
In mixed form: 520/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+56/6 90/70+28/12 90/70+84/6 90/70+28/18 90/70+28/30 90/70+28/42