Add 90/60 and 42/72
1st number: 1 30/60, 2nd number: 42/72
90/60 + 42/72 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 60 × 6 = 360,
90/60 = 90 × 6/60 × 6 = 540/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Add the two like fractions:
540/360 + 210/360 = 540 + 210/360 = 750/360 - 750/360 simplified gives 25/12
- So, 90/60 + 42/72 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+84/72