Subtract 42/45 from 16/56
16/56 - 42/45 is -68/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 45 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
16/56 = 16 × 45/56 × 45 = 720/2520 - Likewise, for the 2nd fraction, since 45 × 56 = 2520,
42/45 = 42 × 56/45 × 56 = 2352/2520 - Subtract the two like fractions:
720/2520 - 2352/2520 = 720 - 2352/2520 = -1632/2520 - After reducing the fraction, the answer is -68/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/56-42/45 16/56-84/45 16/56-42/90 48/56-42/45 80/56-42/45