Subtract 21/60 from 84/81
1st number: 1 3/81, 2nd number: 21/60
84/81 - 21/60 is 371/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 60 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
84/81 = 84 × 20/81 × 20 = 1680/1620 - Likewise, for the 2nd fraction, since 60 × 27 = 1620,
21/60 = 21 × 27/60 × 27 = 567/1620 - Subtract the two like fractions:
1680/1620 - 567/1620 = 1680 - 567/1620 = 1113/1620 - After reducing the fraction, the answer is 371/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81-42/60 84/81-63/60