Add 40/20 and 21/64
1st number: 2 0/20, 2nd number: 21/64
40/20 + 21/64 is 149/64.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 64 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 20 × 16 = 320,
40/20 = 40 × 16/20 × 16 = 640/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
21/64 = 21 × 5/64 × 5 = 105/320 - Add the two like fractions:
640/320 + 105/320 = 640 + 105/320 = 745/320 - 745/320 simplified gives 149/64
- So, 40/20 + 21/64 = 149/64
In mixed form: 221/64
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+21/64 40/20+42/64 40/20+63/64 40/60+21/64