Subtract 3/21 from 90/36
1st number: 2 18/36, 2nd number: 3/21
90/36 - 3/21 is 33/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
3/21 = 3 × 12/21 × 12 = 36/252 - Subtract the two like fractions:
630/252 - 36/252 = 630 - 36/252 = 594/252 - After reducing the fraction, the answer is 33/14
- In mixed form: 25/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36-6/21 90/72-3/21 90/36-3/42 90/36-9/21 90/36-3/63 90/36-15/21