Subtract 63/20 from 45/84
1st number: 45/84, 2nd number: 3 3/20
45/84 - 63/20 is -183/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
45/84 = 45 × 5/84 × 5 = 225/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
63/20 = 63 × 21/20 × 21 = 1323/420 - Subtract the two like fractions:
225/420 - 1323/420 = 225 - 1323/420 = -1098/420 - After reducing the fraction, the answer is -183/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-63/20 45/84-63/40 45/84-63/60