Subtract 72/15 from 30/16
1st number: 1 14/16, 2nd number: 4 12/15
30/16 - 72/15 is -117/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
30/16 = 30 × 15/16 × 15 = 450/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
72/15 = 72 × 16/15 × 16 = 1152/240 - Subtract the two like fractions:
450/240 - 1152/240 = 450 - 1152/240 = -702/240 - After reducing the fraction, the answer is -117/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/16-72/15 30/32-72/15 30/16-72/30 90/16-72/15 30/48-72/15 30/16-72/45 30/80-72/15 30/16-72/75