Add 81/7 and 3/30
1st number: 11 4/7, 2nd number: 3/30
81/7 + 3/30 is 817/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
81/7 = 81 × 30/7 × 30 = 2430/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210 - Add the two like fractions:
2430/210 + 21/210 = 2430 + 21/210 = 2451/210 - 2451/210 simplified gives 817/70
- So, 81/7 + 3/30 = 817/70
In mixed form: 1147/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7+6/30 81/14+3/30 81/7+3/60 81/7+9/30 81/21+3/30 81/7+3/90 81/7+15/30 81/35+3/30 81/7+21/30 81/49+3/30