Subtract 56/20 from 42/48
1st number: 42/48, 2nd number: 2 16/20
42/48 - 56/20 is -77/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 20 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
42/48 = 42 × 5/48 × 5 = 210/240 - Likewise, for the 2nd fraction, since 20 × 12 = 240,
56/20 = 56 × 12/20 × 12 = 672/240 - Subtract the two like fractions:
210/240 - 672/240 = 210 - 672/240 = -462/240 - After reducing the fraction, the answer is -77/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/48-56/20 42/96-56/20 42/48-56/40 42/48-56/60