Add 70/72 and 4/9
70/72 + 4/9 is 17/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
70/72 = 70 × 1/72 × 1 = 70/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
4/9 = 4 × 8/9 × 8 = 32/72 - Add the two like fractions:
70/72 + 32/72 = 70 + 32/72 = 102/72 - 102/72 simplified gives 17/12
- So, 70/72 + 4/9 = 17/12
In mixed form: 15/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/72+8/9 70/72+4/18 70/72+12/9 70/72+4/27 70/72+20/9 70/72+4/45 70/72+28/9 70/72+4/63