Add 70/72 and 21/30
70/72 + 21/30 is 301/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 30 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
70/72 = 70 × 5/72 × 5 = 350/360 - Likewise, for the 2nd fraction, since 30 × 12 = 360,
21/30 = 21 × 12/30 × 12 = 252/360 - Add the two like fractions:
350/360 + 252/360 = 350 + 252/360 = 602/360 - 602/360 simplified gives 301/180
- So, 70/72 + 21/30 = 301/180
In mixed form: 1121/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72+42/30 70/72+21/60 70/72+63/30 70/72+21/90