Subtract 42/7 from 45/84
1st number: 45/84, 2nd number: 6 0/7
45/84 - 42/7 is -153/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
45/84 = 45 × 1/84 × 1 = 45/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
42/7 = 42 × 12/7 × 12 = 504/84 - Subtract the two like fractions:
45/84 - 504/84 = 45 - 504/84 = -459/84 - After reducing the fraction, the answer is -153/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-42/7 45/84-84/7 45/84-42/14 45/84-42/21 45/84-42/35 45/84-42/49