Add 84/5 and 90/72
1st number: 16 4/5, 2nd number: 1 18/72
84/5 + 90/72 is 361/20.
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,
84/5 = 84 × 72/5 × 72 = 6048/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
90/72 = 90 × 5/72 × 5 = 450/360 - Add the two like fractions:
6048/360 + 450/360 = 6048 + 450/360 = 6498/360 - 6498/360 simplified gives 361/20
- So, 84/5 + 90/72 = 361/20
In mixed form: 181/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+90/72 84/15+90/72 84/25+90/72 84/35+90/72