Subtract 30/21 from 84/25, Solve 3 9/25

Subtract 30/21 from 84/25

1^st number: 3 9/25, 2^nd number: 1 9/21

84/25 - 30/21 is 338/175.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525

Next, find the equivalent fraction of both fractional numbers with denominator 525
For the 1st fraction, since 25 × 21 = 525,
84/25 = 84 × 21/25 × 21 = 1764/525
Likewise, for the 2nd fraction, since 21 × 25 = 525,
30/21 = 30 × 25/21 × 25 = 750/525
Subtract the two like fractions:
1764/525 - 750/525 = 1764 - 750/525 = 1014/525
After reducing the fraction, the answer is 338/175
In mixed form: 1163/175

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