Add 18/72 and 4/5
18/72 + 4/5 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
18/72 = 18 × 5/72 × 5 = 90/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
4/5 = 4 × 72/5 × 72 = 288/360 - Add the two like fractions:
90/360 + 288/360 = 90 + 288/360 = 378/360 - 378/360 simplified gives 21/20
- So, 18/72 + 4/5 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+4/5 18/72+8/5 18/72+4/10 54/72+4/5 18/72+12/5 18/72+4/15 90/72+4/5 18/72+20/5 18/72+4/25 18/72+28/5 18/72+4/35