Subtract 25/72 from 42/20
1st number: 2 2/20, 2nd number: 25/72
42/20 - 25/72 is 631/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
42/20 = 42 × 18/20 × 18 = 756/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
25/72 = 25 × 5/72 × 5 = 125/360 - Subtract the two like fractions:
756/360 - 125/360 = 756 - 125/360 = 631/360 - In mixed form: 1271/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20-25/72 42/20-50/72 42/40-25/72 42/20-75/72 42/60-25/72