Subtract 5/10 from 42/2, Solve 21 0/2

Subtract 5/10 from 42/2

1^st number: 21 0/2, 2^nd number: 5/10

42/2 - 5/10 is 41/2.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10

Next, find the equivalent fraction of both fractional numbers with denominator 10
For the 1st fraction, since 2 × 5 = 10,
42/2 = 42 × 5/2 × 5 = 210/10
Likewise, for the 2nd fraction, since 10 × 1 = 10,
5/10 = 5 × 1/10 × 1 = 5/10
Subtract the two like fractions:
210/10 - 5/10 = 210 - 5/10 = 205/10
After reducing the fraction, the answer is 41/2
In mixed form: 201/2

MathStep (Works offline)

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