Subtract 42/72 from 9/15
9/15 - 42/72 is 1/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
9/15 = 9 × 24/15 × 24 = 216/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
42/72 = 42 × 5/72 × 5 = 210/360 - Subtract the two like fractions:
216/360 - 210/360 = 216 - 210/360 = 6/360 - After reducing the fraction, the answer is 1/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-42/72 9/15-84/72 9/30-42/72 27/15-42/72 9/45-42/72 45/15-42/72 9/75-42/72 63/15-42/72