Subtract 40/8 from 21/60
1st number: 21/60, 2nd number: 5 0/8
21/60 - 40/8 is -93/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
40/8 = 40 × 15/8 × 15 = 600/120 - Subtract the two like fractions:
42/120 - 600/120 = 42 - 600/120 = -558/120 - After reducing the fraction, the answer is -93/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60-40/8 21/60-80/8 21/60-40/16 63/60-40/8 21/60-40/24 21/60-40/56