Subtract 70/75 from 21/9, Solve 2 3/9

Subtract 70/75 from 21/9

1^st number: 2 3/9, 2^nd number: 70/75

21/9 - 70/75 is 7/5.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 75 is 225

Next, find the equivalent fraction of both fractional numbers with denominator 225
For the 1st fraction, since 9 × 25 = 225,
21/9 = 21 × 25/9 × 25 = 525/225
Likewise, for the 2nd fraction, since 75 × 3 = 225,
70/75 = 70 × 3/75 × 3 = 210/225
Subtract the two like fractions:
525/225 - 210/225 = 525 - 210/225 = 315/225
After reducing the fraction, the answer is 7/5
In mixed form: 12/5

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