Add 72/42 and 1/15
1st number: 1 30/42, 2nd number: 1/15
72/42 + 1/15 is 187/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
72/42 = 72 × 5/42 × 5 = 360/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
1/15 = 1 × 14/15 × 14 = 14/210 - Add the two like fractions:
360/210 + 14/210 = 360 + 14/210 = 374/210 - 374/210 simplified gives 187/105
- So, 72/42 + 1/15 = 187/105
In mixed form: 182/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+2/15 72/84+1/15 72/42+1/30 72/42+3/15 72/42+1/45 72/42+5/15 72/42+1/75 72/42+7/15