Add 18/72 and 1/20
18/72 + 1/20 is 3/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 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 20 × 18 = 360,
1/20 = 1 × 18/20 × 18 = 18/360 - Add the two like fractions:
90/360 + 18/360 = 90 + 18/360 = 108/360 - 108/360 simplified gives 3/10
- So, 18/72 + 1/20 = 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+1/20 18/72+2/20 18/72+1/40 54/72+1/20 18/72+3/20 18/72+1/60 90/72+1/20 18/72+5/20 18/72+7/20