Add 21/45 and 45/48
21/45 + 45/48 is 337/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
21/45 = 21 × 16/45 × 16 = 336/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
45/48 = 45 × 15/48 × 15 = 675/720 - Add the two like fractions:
336/720 + 675/720 = 336 + 675/720 = 1011/720 - 1011/720 simplified gives 337/240
- So, 21/45 + 45/48 = 337/240
In mixed form: 197/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+45/48 21/45+90/48 21/90+45/48 21/45+45/96 63/45+45/48