Subtract 24/20 from 42/80
1st number: 42/80, 2nd number: 1 4/20
42/80 - 24/20 is -27/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
24/20 = 24 × 4/20 × 4 = 96/80 - Subtract the two like fractions:
42/80 - 96/80 = 42 - 96/80 = -54/80 - After reducing the fraction, the answer is -27/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-24/20 42/80-48/20 42/80-24/40 42/80-72/20 42/80-24/60