Subtract 54/72 from 42/10
1st number: 4 2/10, 2nd number: 54/72
42/10 - 54/72 is 69/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 10 × 36 = 360,
42/10 = 42 × 36/10 × 36 = 1512/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
54/72 = 54 × 5/72 × 5 = 270/360 - Subtract the two like fractions:
1512/360 - 270/360 = 1512 - 270/360 = 1242/360 - After reducing the fraction, the answer is 69/20
- In mixed form: 39/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-54/72 42/20-54/72 42/30-54/72 42/50-54/72 42/70-54/72