Add 75/72 and 42/80
1st number: 1 3/72, 2nd number: 42/80
75/72 + 42/80 is 47/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 72 × 10 = 720,
75/72 = 75 × 10/72 × 10 = 750/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Add the two like fractions:
750/720 + 378/720 = 750 + 378/720 = 1128/720 - 1128/720 simplified gives 47/30
- So, 75/72 + 42/80 = 47/30
In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/72+84/80