Subtract 42/81 from 3/60
3/60 - 42/81 is -253/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 60 × 27 = 1620,
3/60 = 3 × 27/60 × 27 = 81/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
42/81 = 42 × 20/81 × 20 = 840/1620 - Subtract the two like fractions:
81/1620 - 840/1620 = 81 - 840/1620 = -759/1620 - After reducing the fraction, the answer is -253/540
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/60-42/81 3/60-84/81 9/60-42/81 15/60-42/81 21/60-42/81