Subtract 84/45 from 3/84
1st number: 3/84, 2nd number: 1 39/45
3/84 - 84/45 is -769/420.
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,
3/84 = 3 × 15/84 × 15 = 45/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
84/45 = 84 × 28/45 × 28 = 2352/1260 - Subtract the two like fractions:
45/1260 - 2352/1260 = 45 - 2352/1260 = -2307/1260 - After reducing the fraction, the answer is -769/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/84-84/45 3/84-84/90 9/84-84/45 15/84-84/45 21/84-84/45