Subtract 21/16 from 30/50, Solve 30/50

Subtract 21/16 from 30/50

1^st number: 30/50, 2^nd number: 1 5/16

30/50 - 21/16 is -57/80.

Find the least common denominator or LCM of the two denominators:
LCM of 50 and 16 is 400

Next, find the equivalent fraction of both fractional numbers with denominator 400
For the 1st fraction, since 50 × 8 = 400,
30/50 = 30 × 8/50 × 8 = 240/400
Likewise, for the 2nd fraction, since 16 × 25 = 400,
21/16 = 21 × 25/16 × 25 = 525/400
Subtract the two like fractions:
240/400 - 525/400 = 240 - 525/400 = -285/400
After reducing the fraction, the answer is -57/80

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