Subtract 1/90 from 42/4
1st number: 10 2/4, 2nd number: 1/90
42/4 - 1/90 is 472/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
42/4 = 42 × 45/4 × 45 = 1890/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
1/90 = 1 × 2/90 × 2 = 2/180 - Subtract the two like fractions:
1890/180 - 2/180 = 1890 - 2/180 = 1888/180 - After reducing the fraction, the answer is 472/45
- In mixed form: 1022/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/4-1/90 42/4-2/90 42/8-1/90 42/4-3/90 42/12-1/90 42/4-5/90 42/20-1/90 42/4-7/90 42/28-1/90