Add 9/10 and 21/72
9/10 + 21/72 is 143/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
9/10 = 9 × 36/10 × 36 = 324/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Add the two like fractions:
324/360 + 105/360 = 324 + 105/360 = 429/360 - 429/360 simplified gives 143/120
- So, 9/10 + 21/72 = 143/120
In mixed form: 123/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10+21/72 9/10+42/72 9/20+21/72 27/10+21/72 9/10+63/72 9/30+21/72 45/10+21/72 9/50+21/72 63/10+21/72 9/70+21/72