Add 21/45 and 18/48
21/45 + 18/48 is 101/120.
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,
18/48 = 18 × 15/48 × 15 = 270/720 - Add the two like fractions:
336/720 + 270/720 = 336 + 270/720 = 606/720 - 606/720 simplified gives 101/120
- So, 21/45 + 18/48 = 101/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+18/48 21/45+36/48 21/90+18/48 21/45+18/96 63/45+18/48 21/45+54/48 21/45+90/48