Subtract 84/21 from 7/10
1st number: 7/10, 2nd number: 4 0/21
7/10 - 84/21 is -33/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
84/21 = 84 × 10/21 × 10 = 840/210 - Subtract the two like fractions:
147/210 - 840/210 = 147 - 840/210 = -693/210 - After reducing the fraction, the answer is -33/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10-84/21 7/20-84/21 7/10-84/42 21/10-84/21 7/30-84/21 7/10-84/63 35/10-84/21 7/50-84/21 49/10-84/21 7/70-84/21