Add 21/30 and 3/56
21/30 + 3/56 is 211/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 30 × 28 = 840,
21/30 = 21 × 28/30 × 28 = 588/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
3/56 = 3 × 15/56 × 15 = 45/840 - Add the two like fractions:
588/840 + 45/840 = 588 + 45/840 = 633/840 - 633/840 simplified gives 211/280
- So, 21/30 + 3/56 = 211/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+3/56 21/30+6/56 21/60+3/56 63/30+3/56 21/30+9/56 21/90+3/56 21/30+15/56 21/30+21/56