Add 21/90 and 4/56
21/90 + 4/56 is 32/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
21/90 = 21 × 28/90 × 28 = 588/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
4/56 = 4 × 45/56 × 45 = 180/2520 - Add the two like fractions:
588/2520 + 180/2520 = 588 + 180/2520 = 768/2520 - 768/2520 simplified gives 32/105
- So, 21/90 + 4/56 = 32/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90+4/56 21/90+8/56 63/90+4/56 21/90+12/56 21/90+20/56 21/90+28/56