Add 56/21 and 1/80
1st number: 2 14/21, 2nd number: 1/80
56/21 + 1/80 is 643/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
56/21 = 56 × 80/21 × 80 = 4480/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
1/80 = 1 × 21/80 × 21 = 21/1680 - Add the two like fractions:
4480/1680 + 21/1680 = 4480 + 21/1680 = 4501/1680 - 4501/1680 simplified gives 643/240
- So, 56/21 + 1/80 = 643/240
In mixed form: 2163/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+2/80 56/42+1/80 56/21+3/80 56/63+1/80 56/21+5/80 56/21+7/80