Subtract 21/36 from 45/7
1st number: 6 3/7, 2nd number: 21/36
45/7 - 21/36 is 491/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 7 × 36 = 252,
45/7 = 45 × 36/7 × 36 = 1620/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Subtract the two like fractions:
1620/252 - 147/252 = 1620 - 147/252 = 1473/252 - After reducing the fraction, the answer is 491/84
- In mixed form: 571/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/7-21/36 45/7-42/36 45/14-21/36 45/7-21/72 45/7-63/36 45/21-21/36 45/35-21/36 45/49-21/36