Add 72/45 and 42/12
1st number: 1 27/45, 2nd number: 3 6/12
72/45 + 42/12 is 51/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
42/12 = 42 × 15/12 × 15 = 630/180 - Add the two like fractions:
288/180 + 630/180 = 288 + 630/180 = 918/180 - 918/180 simplified gives 51/10
- So, 72/45 + 42/12 = 51/10
In mixed form: 51/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45+84/12 72/90+42/12 72/45+42/24 72/45+42/36 72/45+42/60 72/45+42/84