Add 45/7 and 72/80
1st number: 6 3/7, 2nd number: 72/80
45/7 + 72/80 is 513/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
45/7 = 45 × 80/7 × 80 = 3600/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Add the two like fractions:
3600/560 + 504/560 = 3600 + 504/560 = 4104/560 - 4104/560 simplified gives 513/70
- So, 45/7 + 72/80 = 513/70
In mixed form: 723/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7+72/80 45/14+72/80 45/21+72/80 45/35+72/80 45/49+72/80