Subtract 27/40 from 21/16
1st number: 1 5/16, 2nd number: 27/40
21/16 - 27/40 is 51/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
27/40 = 27 × 2/40 × 2 = 54/80 - Subtract the two like fractions:
105/80 - 54/80 = 105 - 54/80 = 51/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16-27/40 21/16-54/40 21/32-27/40 21/16-27/80 63/16-27/40 21/16-81/40 21/48-27/40 21/80-27/40