Add 90/84 and 30/63
1st number: 1 6/84, 2nd number: 30/63
90/84 + 30/63 is 65/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
90/84 = 90 × 3/84 × 3 = 270/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
30/63 = 30 × 4/63 × 4 = 120/252 - Add the two like fractions:
270/252 + 120/252 = 270 + 120/252 = 390/252 - 390/252 simplified gives 65/42
- So, 90/84 + 30/63 = 65/42
In mixed form: 123/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+60/63 90/84+90/63