Add 90/70 and 7/30
1st number: 1 20/70, 2nd number: 7/30
90/70 + 7/30 is 319/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 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 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Add the two like fractions:
270/210 + 49/210 = 270 + 49/210 = 319/210 - So, 90/70 + 7/30 = 319/210
In mixed form: 1109/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+14/30 90/70+7/60 90/70+21/30 90/70+7/90 90/70+35/30 90/70+49/30