Subtract 2/50 from 30/21, Solve 1 9/21

Subtract 2/50 from 30/21

1^st number: 1 9/21, 2^nd number: 2/50

30/21 - 2/50 is 243/175.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 21 × 50 = 1050,
30/21 = 30 × 50/21 × 50 = 1500/1050
Likewise, for the 2nd fraction, since 50 × 21 = 1050,
2/50 = 2 × 21/50 × 21 = 42/1050
Subtract the two like fractions:
1500/1050 - 42/1050 = 1500 - 42/1050 = 1458/1050
After reducing the fraction, the answer is 243/175
In mixed form: 168/175

MathStep (Works offline)

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