Add 72/80 and 49/56
72/80 + 49/56 is 71/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 56 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Likewise, for the 2nd fraction, since 56 × 10 = 560,
49/56 = 49 × 10/56 × 10 = 490/560 - Add the two like fractions:
504/560 + 490/560 = 504 + 490/560 = 994/560 - 994/560 simplified gives 71/40
- So, 72/80 + 49/56 = 71/40
In mixed form: 131/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/80+98/56