Add 15/21 and 30/64
15/21 + 30/64 is 265/224.
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,
15/21 = 15 × 64/21 × 64 = 960/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
30/64 = 30 × 21/64 × 21 = 630/1344 - Add the two like fractions:
960/1344 + 630/1344 = 960 + 630/1344 = 1590/1344 - 1590/1344 simplified gives 265/224
- So, 15/21 + 30/64 = 265/224
In mixed form: 141/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+30/64 15/21+60/64 15/42+30/64 45/21+30/64 15/21+90/64 15/63+30/64 75/21+30/64