Add 15/5 and 18/72
1st number: 3 0/5, 2nd number: 18/72
15/5 + 18/72 is 13/4.
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,
15/5 = 15 × 72/5 × 72 = 1080/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Add the two like fractions:
1080/360 + 90/360 = 1080 + 90/360 = 1170/360 - 1170/360 simplified gives 13/4
- So, 15/5 + 18/72 = 13/4
In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5+18/72 15/5+36/72 15/10+18/72 45/5+18/72 15/5+54/72 75/5+18/72 15/5+90/72 15/25+18/72 15/35+18/72