Add 75/72 and 21/15
1st number: 1 3/72, 2nd number: 1 6/15
75/72 + 21/15 is 293/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 15 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
75/72 = 75 × 5/72 × 5 = 375/360 - Likewise, for the 2nd fraction, since 15 × 24 = 360,
21/15 = 21 × 24/15 × 24 = 504/360 - Add the two like fractions:
375/360 + 504/360 = 375 + 504/360 = 879/360 - 879/360 simplified gives 293/120
- So, 75/72 + 21/15 = 293/120
In mixed form: 253/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/72+42/15 75/72+21/30 75/72+63/15 75/72+21/45 75/72+21/75