Add 72/75 and 42/63
72/75 + 42/63 is 122/75.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 63 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 75 × 21 = 1575,
72/75 = 72 × 21/75 × 21 = 1512/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
42/63 = 42 × 25/63 × 25 = 1050/1575 - Add the two like fractions:
1512/1575 + 1050/1575 = 1512 + 1050/1575 = 2562/1575 - 2562/1575 simplified gives 122/75
- So, 72/75 + 42/63 = 122/75
In mixed form: 147/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/75+84/63