Subtract 18/6 from 21/16
1st number: 1 5/16, 2nd number: 3 0/6
21/16 - 18/6 is -27/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 6 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 16 × 3 = 48,
21/16 = 21 × 3/16 × 3 = 63/48 - Likewise, for the 2nd fraction, since 6 × 8 = 48,
18/6 = 18 × 8/6 × 8 = 144/48 - Subtract the two like fractions:
63/48 - 144/48 = 63 - 144/48 = -81/48 - After reducing the fraction, the answer is -27/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16-18/6 21/16-36/6 21/32-18/6 21/16-18/12 63/16-18/6 21/16-54/6 21/48-18/6 21/16-90/6 21/80-18/6 21/16-18/30 21/16-18/42