Subtract 15/42 from 36/45
36/45 - 15/42 is 31/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
36/45 = 36 × 14/45 × 14 = 504/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Subtract the two like fractions:
504/630 - 225/630 = 504 - 225/630 = 279/630 - After reducing the fraction, the answer is 31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/45-15/42 36/45-30/42 36/90-15/42 36/45-15/84 36/45-45/42 36/45-75/42