Subtract 21/60 from 4/40
4/40 - 21/60 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 60 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
4/40 = 4 × 3/40 × 3 = 12/120 - Likewise, for the 2nd fraction, since 60 × 2 = 120,
21/60 = 21 × 2/60 × 2 = 42/120 - Subtract the two like fractions:
12/120 - 42/120 = 12 - 42/120 = -30/120 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40-21/60 4/40-42/60 4/80-21/60 12/40-21/60 4/40-63/60 20/40-21/60 28/40-21/60