Subtract 16/9 from 30/42
1st number: 30/42, 2nd number: 1 7/9
30/42 - 16/9 is -67/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
30/42 = 30 × 3/42 × 3 = 90/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
16/9 = 16 × 14/9 × 14 = 224/126 - Subtract the two like fractions:
90/126 - 224/126 = 90 - 224/126 = -134/126 - After reducing the fraction, the answer is -67/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-16/9 30/42-32/9 30/84-16/9 30/42-16/18 90/42-16/9 30/42-48/9 30/42-16/27 30/42-80/9 30/42-16/45 30/42-16/63