Subtract 42/45 from 75/30
1st number: 2 15/30, 2nd number: 42/45
75/30 - 42/45 is 47/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
75/30 = 75 × 3/30 × 3 = 225/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Subtract the two like fractions:
225/90 - 84/90 = 225 - 84/90 = 141/90 - After reducing the fraction, the answer is 47/30
- In mixed form: 117/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/30-84/45 75/60-42/45 75/30-42/90 75/90-42/45