Add 81/30 and 3/42
1st number: 2 21/30, 2nd number: 3/42
81/30 + 3/42 is 97/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Add the two like fractions:
567/210 + 15/210 = 567 + 15/210 = 582/210 - 582/210 simplified gives 97/35
- So, 81/30 + 3/42 = 97/35
In mixed form: 227/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+6/42 81/60+3/42 81/30+3/84 81/30+9/42 81/90+3/42 81/30+15/42 81/30+21/42