Add 21/72 and 72/60
1st number: 21/72, 2nd number: 1 12/60
21/72 + 72/60 is 179/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 60 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 60 × 6 = 360,
72/60 = 72 × 6/60 × 6 = 432/360 - Add the two like fractions:
105/360 + 432/360 = 105 + 432/360 = 537/360 - 537/360 simplified gives 179/120
- So, 21/72 + 72/60 = 179/120
In mixed form: 159/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72+72/60 63/72+72/60