Add 25/21 and 90/64
1st number: 1 4/21, 2nd number: 1 26/64
25/21 + 90/64 is 1745/672.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 21 × 64 = 1344,
25/21 = 25 × 64/21 × 64 = 1600/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
90/64 = 90 × 21/64 × 21 = 1890/1344 - Add the two like fractions:
1600/1344 + 1890/1344 = 1600 + 1890/1344 = 3490/1344 - 3490/1344 simplified gives 1745/672
- So, 25/21 + 90/64 = 1745/672
In mixed form: 2401/672
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+90/64 25/42+90/64 75/21+90/64 25/63+90/64