Add 21/72 and 30/10
1st number: 21/72, 2nd number: 3 0/10
21/72 + 30/10 is 79/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
30/10 = 30 × 36/10 × 36 = 1080/360 - Add the two like fractions:
105/360 + 1080/360 = 105 + 1080/360 = 1185/360 - 1185/360 simplified gives 79/24
- So, 21/72 + 30/10 = 79/24
In mixed form: 37/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72+30/10 21/72+60/10 21/72+30/20 63/72+30/10 21/72+90/10 21/72+30/50 21/72+30/70