Add 21/75 and 63/64
21/75 + 63/64 is 2023/1600.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 64 is 4800
Next, find the equivalent fraction of both fractional numbers with denominator 4800 - For the 1st fraction, since 75 × 64 = 4800,
21/75 = 21 × 64/75 × 64 = 1344/4800 - Likewise, for the 2nd fraction, since 64 × 75 = 4800,
63/64 = 63 × 75/64 × 75 = 4725/4800 - Add the two like fractions:
1344/4800 + 4725/4800 = 1344 + 4725/4800 = 6069/4800 - 6069/4800 simplified gives 2023/1600
- So, 21/75 + 63/64 = 2023/1600
In mixed form: 1423/1600
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/75+63/64 63/75+63/64