Subtract 15/50 from 42/5, Solve 8 2/5

Subtract 15/50 from 42/5

1^st number: 8 2/5, 2^nd number: 15/50

42/5 - 15/50 is 81/10.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 50 is 50

Next, find the equivalent fraction of both fractional numbers with denominator 50
For the 1st fraction, since 5 × 10 = 50,
42/5 = 42 × 10/5 × 10 = 420/50
Likewise, for the 2nd fraction, since 50 × 1 = 50,
15/50 = 15 × 1/50 × 1 = 15/50
Subtract the two like fractions:
420/50 - 15/50 = 420 - 15/50 = 405/50
After reducing the fraction, the answer is 81/10
In mixed form: 81/10

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad