Add 90/72 and 90/12
1st number: 1 18/72, 2nd number: 7 6/12
90/72 + 90/12 is 35/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 12 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Likewise, for the 2nd fraction, since 12 × 6 = 72,
90/12 = 90 × 6/12 × 6 = 540/72 - Add the two like fractions:
90/72 + 540/72 = 90 + 540/72 = 630/72 - 630/72 simplified gives 35/4
- So, 90/72 + 90/12 = 35/4
In mixed form: 83/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+90/24 90/72+90/36 90/72+90/60 90/72+90/84