Add 90/5 and 12/72
1st number: 18 0/5, 2nd number: 12/72
90/5 + 12/72 is 109/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
90/5 = 90 × 72/5 × 72 = 6480/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
12/72 = 12 × 5/72 × 5 = 60/360 - Add the two like fractions:
6480/360 + 60/360 = 6480 + 60/360 = 6540/360 - 6540/360 simplified gives 109/6
- So, 90/5 + 12/72 = 109/6
In mixed form: 181/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/5+24/72 90/10+12/72 90/5+36/72 90/15+12/72 90/5+60/72 90/25+12/72 90/5+84/72 90/35+12/72