Add 42/72 and 25/18
1st number: 42/72, 2nd number: 1 7/18
42/72 + 25/18 is 71/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
25/18 = 25 × 4/18 × 4 = 100/72 - Add the two like fractions:
42/72 + 100/72 = 42 + 100/72 = 142/72 - 142/72 simplified gives 71/36
- So, 42/72 + 25/18 = 71/36
In mixed form: 135/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/72+25/18 42/72+50/18 42/72+25/36 42/72+75/18 42/72+25/54 42/72+25/90