Subtract 16/10 from 40/42
1st number: 40/42, 2nd number: 1 6/10
40/42 - 16/10 is -68/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
16/10 = 16 × 21/10 × 21 = 336/210 - Subtract the two like fractions:
200/210 - 336/210 = 200 - 336/210 = -136/210 - 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: 80/42-16/10 40/42-32/10 40/84-16/10 40/42-16/20 40/42-48/10 40/42-16/30 40/42-80/10 40/42-16/50 40/42-16/70