Subtract 36/10 from 21/90
1st number: 21/90, 2nd number: 3 6/10
21/90 - 36/10 is -101/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
36/10 = 36 × 9/10 × 9 = 324/90 - Subtract the two like fractions:
21/90 - 324/90 = 21 - 324/90 = -303/90 - After reducing the fraction, the answer is -101/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90-36/10 21/90-72/10 21/90-36/20 63/90-36/10 21/90-36/30 21/90-36/50 21/90-36/70