Subtract 42/36 from 16/90
1st number: 16/90, 2nd number: 1 6/36
16/90 - 42/36 is -89/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
16/90 = 16 × 2/90 × 2 = 32/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
42/36 = 42 × 5/36 × 5 = 210/180 - Subtract the two like fractions:
32/180 - 210/180 = 32 - 210/180 = -178/180 - After reducing the fraction, the answer is -89/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/90-42/36 16/90-84/36 16/90-42/72 48/90-42/36 80/90-42/36