Subtract 25/70 from 21/2, Solve 10 1/2

Subtract 25/70 from 21/2

1^st number: 10 1/2, 2^nd number: 25/70

21/2 - 25/70 is 71/7.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 70 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 2 × 35 = 70,
21/2 = 21 × 35/2 × 35 = 735/70
Likewise, for the 2nd fraction, since 70 × 1 = 70,
25/70 = 25 × 1/70 × 1 = 25/70
Subtract the two like fractions:
735/70 - 25/70 = 735 - 25/70 = 710/70
After reducing the fraction, the answer is 71/7
In mixed form: 101/7

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