Subtract 42/40 from 20/75
1st number: 20/75, 2nd number: 1 2/40
20/75 - 42/40 is -47/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 40 is 600
Next, find the equivalent fraction of both fractional numbers with denominator 600 - For the 1st fraction, since 75 × 8 = 600,
20/75 = 20 × 8/75 × 8 = 160/600 - Likewise, for the 2nd fraction, since 40 × 15 = 600,
42/40 = 42 × 15/40 × 15 = 630/600 - Subtract the two like fractions:
160/600 - 630/600 = 160 - 630/600 = -470/600 - After reducing the fraction, the answer is -47/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/75-42/40 20/75-84/40 20/75-42/80 60/75-42/40