Subtract 45/5 from 12/42
1st number: 12/42, 2nd number: 9 0/5
12/42 - 45/5 is -61/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
45/5 = 45 × 42/5 × 42 = 1890/210 - Subtract the two like fractions:
60/210 - 1890/210 = 60 - 1890/210 = -1830/210 - After reducing the fraction, the answer is -61/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-45/5 12/42-90/5 12/84-45/5 12/42-45/10 36/42-45/5 12/42-45/15 60/42-45/5 12/42-45/25 84/42-45/5 12/42-45/35