Subtract 49/4 from 42/45
1st number: 42/45, 2nd number: 12 1/4
42/45 - 49/4 is -679/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
42/45 = 42 × 4/45 × 4 = 168/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
49/4 = 49 × 45/4 × 45 = 2205/180 - Subtract the two like fractions:
168/180 - 2205/180 = 168 - 2205/180 = -2037/180 - After reducing the fraction, the answer is -679/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45-49/4 42/45-98/4 42/90-49/4 42/45-49/8 42/45-49/12 42/45-49/20 42/45-49/28