Subtract 1/90 from 42/24
1st number: 1 18/24, 2nd number: 1/90
42/24 - 1/90 is 313/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
42/24 = 42 × 15/24 × 15 = 630/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
1/90 = 1 × 4/90 × 4 = 4/360 - Subtract the two like fractions:
630/360 - 4/360 = 630 - 4/360 = 626/360 - After reducing the fraction, the answer is 313/180
- In mixed form: 1133/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24-1/90 42/24-2/90 42/48-1/90 42/24-3/90 42/72-1/90 42/24-5/90 42/24-7/90