Add 56/64 and 20/18
1st number: 56/64, 2nd number: 1 2/18
56/64 + 20/18 is 143/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 18 is 576
Next, find the equivalent fraction of both fractional numbers with denominator 576 - For the 1st fraction, since 64 × 9 = 576,
56/64 = 56 × 9/64 × 9 = 504/576 - Likewise, for the 2nd fraction, since 18 × 32 = 576,
20/18 = 20 × 32/18 × 32 = 640/576 - Add the two like fractions:
504/576 + 640/576 = 504 + 640/576 = 1144/576 - 1144/576 simplified gives 143/72
- So, 56/64 + 20/18 = 143/72
In mixed form: 171/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/64+40/18 56/64+20/36 56/64+60/18 56/64+20/54 56/64+20/90