Subtract 90/63 from 3/84
1st number: 3/84, 2nd number: 1 27/63
3/84 - 90/63 is -39/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
3/84 = 3 × 3/84 × 3 = 9/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
90/63 = 90 × 4/63 × 4 = 360/252 - Subtract the two like fractions:
9/252 - 360/252 = 9 - 360/252 = -351/252 - After reducing the fraction, the answer is -39/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84-90/63 9/84-90/63 15/84-90/63 21/84-90/63