Subtract 16/42 from 9/45
9/45 - 16/42 is -19/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
9/45 = 9 × 14/45 × 14 = 126/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
16/42 = 16 × 15/42 × 15 = 240/630 - Subtract the two like fractions:
126/630 - 240/630 = 126 - 240/630 = -114/630 - After reducing the fraction, the answer is -19/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/45-16/42 9/45-32/42 9/90-16/42 9/45-16/84 27/45-16/42 9/45-48/42 9/45-80/42 63/45-16/42