Subtract 70/45 from 7/84
1st number: 7/84, 2nd number: 1 25/45
7/84 - 70/45 is -53/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
7/84 = 7 × 15/84 × 15 = 105/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
70/45 = 70 × 28/45 × 28 = 1960/1260 - Subtract the two like fractions:
105/1260 - 1960/1260 = 105 - 1960/1260 = -1855/1260 - After reducing the fraction, the answer is -53/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84-70/45 7/84-70/90 21/84-70/45 35/84-70/45 49/84-70/45