Add 18/20 and 3/72
18/20 + 3/72 is 113/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
18/20 = 18 × 18/20 × 18 = 324/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360 - Add the two like fractions:
324/360 + 15/360 = 324 + 15/360 = 339/360 - 339/360 simplified gives 113/120
- So, 18/20 + 3/72 = 113/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+3/72 18/20+6/72 18/40+3/72 54/20+3/72 18/20+9/72 18/60+3/72 90/20+3/72 18/20+15/72 18/20+21/72