Subtract 16/42 from 72/30
1st number: 2 12/30, 2nd number: 16/42
72/30 - 16/42 is 212/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
16/42 = 16 × 5/42 × 5 = 80/210 - Subtract the two like fractions:
504/210 - 80/210 = 504 - 80/210 = 424/210 - After reducing the fraction, the answer is 212/105
- In mixed form: 22/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30-32/42 72/60-16/42 72/30-16/84 72/30-48/42 72/90-16/42 72/30-80/42