Add 81/70 and 7/30
1st number: 1 11/70, 2nd number: 7/30
81/70 + 7/30 is 146/105.
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,
81/70 = 81 × 3/70 × 3 = 243/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Add the two like fractions:
243/210 + 49/210 = 243 + 49/210 = 292/210 - 292/210 simplified gives 146/105
- So, 81/70 + 7/30 = 146/105
In mixed form: 141/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/70+14/30 81/70+7/60 81/70+21/30 81/70+7/90 81/70+35/30 81/70+49/30