Add 21/28 and 32/45
21/28 + 32/45 is 263/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
21/28 = 21 × 45/28 × 45 = 945/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
32/45 = 32 × 28/45 × 28 = 896/1260 - Add the two like fractions:
945/1260 + 896/1260 = 945 + 896/1260 = 1841/1260 - 1841/1260 simplified gives 263/180
- So, 21/28 + 32/45 = 263/180
In mixed form: 183/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+32/45 21/28+64/45 21/56+32/45 21/28+32/90 63/28+32/45 21/28+96/45 21/84+32/45