Add 90/63 and 21/7
1st number: 1 27/63, 2nd number: 3 0/7
90/63 + 21/7 is 31/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
90/63 = 90 × 1/63 × 1 = 90/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
21/7 = 21 × 9/7 × 9 = 189/63 - Add the two like fractions:
90/63 + 189/63 = 90 + 189/63 = 279/63 - 279/63 simplified gives 31/7
- So, 90/63 + 21/7 = 31/7
In mixed form: 43/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63+42/7 90/63+21/14 90/63+63/7 90/63+21/35 90/63+21/49