Subtract 2/20 from 21/48
21/48 - 2/20 is 27/80.
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,
21/48 = 21 × 5/48 × 5 = 105/240 - Likewise, for the 2nd fraction, since 20 × 12 = 240,
2/20 = 2 × 12/20 × 12 = 24/240 - Subtract the two like fractions:
105/240 - 24/240 = 105 - 24/240 = 81/240 - After reducing the fraction, the answer is 27/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/48-2/20 21/48-4/20 21/96-2/20 21/48-2/40 63/48-2/20 21/48-6/20 21/48-2/60 21/48-10/20 21/48-14/20