Subtract 42/90 from 45/3
1st number: 15 0/3, 2nd number: 42/90
45/3 - 42/90 is 218/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 3 × 30 = 90,
45/3 = 45 × 30/3 × 30 = 1350/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
42/90 = 42 × 1/90 × 1 = 42/90 - Subtract the two like fractions:
1350/90 - 42/90 = 1350 - 42/90 = 1308/90 - After reducing the fraction, the answer is 218/15
- In mixed form: 148/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-42/90 45/3-84/90 45/6-42/90 45/9-42/90 45/15-42/90 45/21-42/90