Subtract 2/84 from 30/18, Solve 1 12/18

Subtract 2/84 from 30/18

1^st number: 1 12/18, 2^nd number: 2/84

30/18 - 2/84 is 23/14.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 18 × 14 = 252,
30/18 = 30 × 14/18 × 14 = 420/252
Likewise, for the 2nd fraction, since 84 × 3 = 252,
2/84 = 2 × 3/84 × 3 = 6/252
Subtract the two like fractions:
420/252 - 6/252 = 420 - 6/252 = 414/252
After reducing the fraction, the answer is 23/14
In mixed form: 19/14

MathStep (Works offline)

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