Add 3/72 and 72/20
1st number: 3/72, 2nd number: 3 12/20
3/72 + 72/20 is 437/120.
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,
3/72 = 3 × 5/72 × 5 = 15/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
72/20 = 72 × 18/20 × 18 = 1296/360 - Add the two like fractions:
15/360 + 1296/360 = 15 + 1296/360 = 1311/360 - 1311/360 simplified gives 437/120
- So, 3/72 + 72/20 = 437/120
In mixed form: 377/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72+72/20 3/72+72/40 9/72+72/20 3/72+72/60 15/72+72/20 21/72+72/20