Subtract 42/90 from 30/2
1st number: 15 0/2, 2nd number: 42/90
30/2 - 42/90 is 218/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
30/2 = 30 × 45/2 × 45 = 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: 60/2-42/90 30/2-84/90 30/4-42/90 90/2-42/90 30/6-42/90 30/10-42/90 30/14-42/90