Add 21/56 and 28/45
21/56 + 28/45 is 359/360.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
21/56 = 21 × 45/56 × 45 = 945/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
28/45 = 28 × 56/45 × 56 = 1568/2520 - Add the two like fractions:
945/2520 + 1568/2520 = 945 + 1568/2520 = 2513/2520 - 2513/2520 simplified gives 359/360
- So, 21/56 + 28/45 = 359/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56+28/45 21/56+56/45 21/56+28/90 63/56+28/45 21/56+84/45