Add 90/21 and 60/63
1st number: 4 6/21, 2nd number: 60/63
90/21 + 60/63 is 110/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
90/21 = 90 × 3/21 × 3 = 270/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
60/63 = 60 × 1/63 × 1 = 60/63 - Add the two like fractions:
270/63 + 60/63 = 270 + 60/63 = 330/63 - 330/63 simplified gives 110/21
- So, 90/21 + 60/63 = 110/21
In mixed form: 55/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+60/63 90/63+60/63