Subtract 21/84 from 10/40
10/40 - 21/84 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
10/40 = 10 × 21/40 × 21 = 210/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
21/84 = 21 × 10/84 × 10 = 210/840 - Subtract the two like fractions:
210/840 - 210/840 = 210 - 210/840 = 0/840 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-21/84 10/40-42/84 10/80-21/84 30/40-21/84 10/40-63/84 50/40-21/84 70/40-21/84