Add 21/45 and 18/16
1st number: 21/45, 2nd number: 1 2/16
21/45 + 18/16 is 191/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 16 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 16 × 45 = 720,
18/16 = 18 × 45/16 × 45 = 810/720 - Add the two like fractions:
336/720 + 810/720 = 336 + 810/720 = 1146/720 - 1146/720 simplified gives 191/120
- So, 21/45 + 18/16 = 191/120
In mixed form: 171/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+18/16 21/45+36/16 21/90+18/16 21/45+18/32 63/45+18/16 21/45+54/16 21/45+18/48 21/45+90/16 21/45+18/80