Add 3/72 and 12/20
3/72 + 12/20 is 77/120.
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,
12/20 = 12 × 18/20 × 18 = 216/360 - Add the two like fractions:
15/360 + 216/360 = 15 + 216/360 = 231/360 - 231/360 simplified gives 77/120
- So, 3/72 + 12/20 = 77/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72+12/20 3/72+24/20 3/72+12/40 9/72+12/20 3/72+36/20 3/72+12/60 15/72+12/20 3/72+60/20 21/72+12/20 3/72+84/20