Subtract 5/64 from 20/42
20/42 - 5/64 is 535/1344.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 64 is 1344
Next, find the equivalent fraction of both fractional numbers with denominator 1344 - For the 1st fraction, since 42 × 32 = 1344,
20/42 = 20 × 32/42 × 32 = 640/1344 - Likewise, for the 2nd fraction, since 64 × 21 = 1344,
5/64 = 5 × 21/64 × 21 = 105/1344 - Subtract the two like fractions:
640/1344 - 105/1344 = 640 - 105/1344 = 535/1344
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-5/64 20/42-10/64 20/84-5/64 60/42-5/64 20/42-15/64 20/42-25/64 20/42-35/64