Add 3/72 and 21/5
1st number: 3/72, 2nd number: 4 1/5
3/72 + 21/5 is 509/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 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 5 × 72 = 360,
21/5 = 21 × 72/5 × 72 = 1512/360 - Add the two like fractions:
15/360 + 1512/360 = 15 + 1512/360 = 1527/360 - 1527/360 simplified gives 509/120
- So, 3/72 + 21/5 = 509/120
In mixed form: 429/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72+21/5 3/72+42/5 3/72+21/10 9/72+21/5 3/72+63/5 3/72+21/15 15/72+21/5 3/72+21/25 21/72+21/5 3/72+21/35