Subtract 21/50 from 84/18, Solve 4 12/18

Subtract 21/50 from 84/18

1^st number: 4 12/18, 2^nd number: 21/50

84/18 - 21/50 is 637/150.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 50 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 18 × 25 = 450,
84/18 = 84 × 25/18 × 25 = 2100/450
Likewise, for the 2nd fraction, since 50 × 9 = 450,
21/50 = 21 × 9/50 × 9 = 189/450
Subtract the two like fractions:
2100/450 - 189/450 = 2100 - 189/450 = 1911/450
After reducing the fraction, the answer is 637/150
In mixed form: 437/150

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