Add 21/48 and 7/45
21/48 + 7/45 is 427/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 48 × 15 = 720,
21/48 = 21 × 15/48 × 15 = 315/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
7/45 = 7 × 16/45 × 16 = 112/720 - Add the two like fractions:
315/720 + 112/720 = 315 + 112/720 = 427/720 - So, 21/48 + 7/45 = 427/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48+7/45 21/48+14/45 21/96+7/45 21/48+7/90 63/48+7/45 21/48+21/45 21/48+35/45 21/48+49/45