Subtract 70/9 from 3/84
1st number: 3/84, 2nd number: 7 7/9
3/84 - 70/9 is -1951/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 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 9 × 28 = 252,
70/9 = 70 × 28/9 × 28 = 1960/252 - Subtract the two like fractions:
9/252 - 1960/252 = 9 - 1960/252 = -1951/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84-70/9 3/84-70/18 9/84-70/9 3/84-70/27 15/84-70/9 3/84-70/45 21/84-70/9 3/84-70/63