Add 56/30 and 90/21
1st number: 1 26/30, 2nd number: 4 6/21
56/30 + 90/21 is 646/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
56/30 = 56 × 7/30 × 7 = 392/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
90/21 = 90 × 10/21 × 10 = 900/210 - Add the two like fractions:
392/210 + 900/210 = 392 + 900/210 = 1292/210 - 1292/210 simplified gives 646/105
- So, 56/30 + 90/21 = 646/105
In mixed form: 616/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/60+90/21 56/30+90/42 56/90+90/21 56/30+90/63