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

Subtract 25/21 from 2/10

1^st number: 2/10, 2^nd number: 1 4/21

2/10 - 25/21 is -104/105.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 10 × 21 = 210,
2/10 = 2 × 21/10 × 21 = 42/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
25/21 = 25 × 10/21 × 10 = 250/210
Subtract the two like fractions:
42/210 - 250/210 = 42 - 250/210 = -208/210
After reducing the fraction, the answer is -104/105

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