Add 72/42 and 18/5
1st number: 1 30/42, 2nd number: 3 3/5
72/42 + 18/5 is 186/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 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 5 × 42 = 210,
18/5 = 18 × 42/5 × 42 = 756/210 - Add the two like fractions:
360/210 + 756/210 = 360 + 756/210 = 1116/210 - 1116/210 simplified gives 186/35
- So, 72/42 + 18/5 = 186/35
In mixed form: 511/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+36/5 72/84+18/5 72/42+18/10 72/42+54/5 72/42+18/15 72/42+90/5 72/42+18/25 72/42+18/35