Subtract 8/60 from 21/54
21/54 - 8/60 is 23/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 60 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
21/54 = 21 × 10/54 × 10 = 210/540 - Likewise, for the 2nd fraction, since 60 × 9 = 540,
8/60 = 8 × 9/60 × 9 = 72/540 - Subtract the two like fractions:
210/540 - 72/540 = 210 - 72/540 = 138/540 - After reducing the fraction, the answer is 23/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/54-8/60 21/54-16/60 63/54-8/60 21/54-24/60 21/54-40/60 21/54-56/60