Add 81/28 and 72/63
1st number: 2 25/28, 2nd number: 1 9/63
81/28 + 72/63 is 113/28.
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,
81/28 = 81 × 9/28 × 9 = 729/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
72/63 = 72 × 4/63 × 4 = 288/252 - Add the two like fractions:
729/252 + 288/252 = 729 + 288/252 = 1017/252 - 1017/252 simplified gives 113/28
- So, 81/28 + 72/63 = 113/28
In mixed form: 41/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56+72/63 81/84+72/63