Subtract 16/21 from 40/18
1st number: 2 4/18, 2nd number: 16/21
40/18 - 16/21 is 92/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
16/21 = 16 × 6/21 × 6 = 96/126 - Subtract the two like fractions:
280/126 - 96/126 = 280 - 96/126 = 184/126 - After reducing the fraction, the answer is 92/63
- In mixed form: 129/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-16/21 40/18-32/21 40/36-16/21 40/18-16/42 40/18-48/21 40/54-16/21 40/18-16/63 40/18-80/21 40/90-16/21