Subtract 63/4 from 84/42
1st number: 2 0/42, 2nd number: 15 3/4
84/42 - 63/4 is -55/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
84/42 = 84 × 2/42 × 2 = 168/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
63/4 = 63 × 21/4 × 21 = 1323/84 - Subtract the two like fractions:
168/84 - 1323/84 = 168 - 1323/84 = -1155/84 - After reducing the fraction, the answer is -55/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-63/8 84/42-63/12 84/42-63/20 84/42-63/28