Add 36/72 and 42/40
1st number: 36/72, 2nd number: 1 2/40
36/72 + 42/40 is 31/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
36/72 = 36 × 5/72 × 5 = 180/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
42/40 = 42 × 9/40 × 9 = 378/360 - Add the two like fractions:
180/360 + 378/360 = 180 + 378/360 = 558/360 - 558/360 simplified gives 31/20
- So, 36/72 + 42/40 = 31/20
In mixed form: 111/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+84/40 36/72+42/80