Add 56/4 and 30/21
1st number: 14 0/4, 2nd number: 1 9/21
56/4 + 30/21 is 108/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
56/4 = 56 × 21/4 × 21 = 1176/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
30/21 = 30 × 4/21 × 4 = 120/84 - Add the two like fractions:
1176/84 + 120/84 = 1176 + 120/84 = 1296/84 - 1296/84 simplified gives 108/7
- So, 56/4 + 30/21 = 108/7
In mixed form: 153/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4+60/21 56/8+30/21 56/4+30/42 56/4+90/21 56/12+30/21 56/4+30/63 56/20+30/21 56/28+30/21