Subtract 80/21 from 60/54
1st number: 1 6/54, 2nd number: 3 17/21
60/54 - 80/21 is -170/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
60/54 = 60 × 7/54 × 7 = 420/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
80/21 = 80 × 18/21 × 18 = 1440/378 - Subtract the two like fractions:
420/378 - 1440/378 = 420 - 1440/378 = -1020/378 - After reducing the fraction, the answer is -170/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/54-80/42 60/54-80/63