Subtract 1/40 from 21/4
1st number: 5 1/4, 2nd number: 1/40
21/4 - 1/40 is 209/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 4 × 10 = 40,
21/4 = 21 × 10/4 × 10 = 210/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
1/40 = 1 × 1/40 × 1 = 1/40 - Subtract the two like fractions:
210/40 - 1/40 = 210 - 1/40 = 209/40 - In mixed form: 59/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-1/40 21/4-2/40 21/8-1/40 21/4-1/80 63/4-1/40 21/4-3/40 21/12-1/40 21/4-5/40 21/20-1/40 21/4-7/40 21/28-1/40