Add 84/28 and 72/63
1st number: 3 0/28, 2nd number: 1 9/63
84/28 + 72/63 is 29/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
84/28 = 84 × 9/28 × 9 = 756/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
72/63 = 72 × 4/63 × 4 = 288/252 - Add the two like fractions:
756/252 + 288/252 = 756 + 288/252 = 1044/252 - 1044/252 simplified gives 29/7
- So, 84/28 + 72/63 = 29/7
In mixed form: 41/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+72/63