Subtract 84/10 from 80/21
1st number: 3 17/21, 2nd number: 8 4/10
80/21 - 84/10 is -482/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
80/21 = 80 × 10/21 × 10 = 800/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
84/10 = 84 × 21/10 × 21 = 1764/210 - Subtract the two like fractions:
800/210 - 1764/210 = 800 - 1764/210 = -964/210 - After reducing the fraction, the answer is -482/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42-84/10 80/21-84/20 80/63-84/10 80/21-84/30 80/21-84/50 80/21-84/70