Subtract 42/8 from 16/7
1st number: 2 2/7, 2nd number: 5 2/8
16/7 - 42/8 is -83/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
16/7 = 16 × 8/7 × 8 = 128/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
42/8 = 42 × 7/8 × 7 = 294/56 - Subtract the two like fractions:
128/56 - 294/56 = 128 - 294/56 = -166/56 - After reducing the fraction, the answer is -83/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/7-42/8 16/7-84/8 16/14-42/8 16/7-42/16 48/7-42/8 16/21-42/8 16/7-42/24 80/7-42/8 16/35-42/8 16/7-42/40 16/49-42/8 16/7-42/56