Subtract 21/16 from 72/10
1st number: 7 2/10, 2nd number: 1 5/16
72/10 - 21/16 is 471/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
72/10 = 72 × 8/10 × 8 = 576/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Subtract the two like fractions:
576/80 - 105/80 = 576 - 105/80 = 471/80 - In mixed form: 571/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/10-42/16 72/20-21/16 72/10-21/32 72/10-63/16 72/30-21/16 72/10-21/48 72/50-21/16 72/10-21/80 72/70-21/16