Subtract 42/16 from 63/21
1st number: 3 0/21, 2nd number: 2 10/16
63/21 - 42/16 is 3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
63/21 = 63 × 16/21 × 16 = 1008/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
42/16 = 42 × 21/16 × 21 = 882/336 - Subtract the two like fractions:
1008/336 - 882/336 = 1008 - 882/336 = 126/336 - After reducing the fraction, the answer is 3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21-84/16 63/42-42/16 63/21-42/32 63/21-42/48 63/21-42/80