Add 7/45 and 63/80
7/45 + 63/80 is 679/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
7/45 = 7 × 16/45 × 16 = 112/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
63/80 = 63 × 9/80 × 9 = 567/720 - Add the two like fractions:
112/720 + 567/720 = 112 + 567/720 = 679/720 - So, 7/45 + 63/80 = 679/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45+63/80 7/90+63/80 21/45+63/80 35/45+63/80 49/45+63/80