Subtract 42/7 from 45/3
1st number: 15 0/3, 2nd number: 6 0/7
45/3 - 42/7 is 9/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
45/3 = 45 × 7/3 × 7 = 315/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
42/7 = 42 × 3/7 × 3 = 126/21 - Subtract the two like fractions:
315/21 - 126/21 = 315 - 126/21 = 189/21 - After reducing the fraction, the answer is 9/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-42/7 45/3-84/7 45/6-42/7 45/3-42/14 45/9-42/7 45/3-42/21 45/15-42/7 45/3-42/35 45/21-42/7 45/3-42/49