Subtract 20/27 from 60/21
1st number: 2 18/21, 2nd number: 20/27
60/21 - 20/27 is 400/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
60/21 = 60 × 9/21 × 9 = 540/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
20/27 = 20 × 7/27 × 7 = 140/189 - Subtract the two like fractions:
540/189 - 140/189 = 540 - 140/189 = 400/189 - In mixed form: 222/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-40/27 60/42-20/27 60/21-20/54 60/21-60/27 60/63-20/27 60/21-20/81