Question

7/42 - 8/21 = -3/14 tell me the complete explanation on the page ​

Answer 1

Step-by-step explanation:

$\frac{7}{42} - \frac{8}{21} = - \frac{3}{14} \\ \frac{7 - 16}{42} = - \frac{ 3}{14} \\ - \frac{9}{42} = - \frac{3}{14} \\ - 126 = - 126$

hence these are equal

Answer 2

LHS

lcm of 42 and 21 is 42

8/21=8/21*2/2

=16/42

7/42 - 8/21

=7/42-16/42

=7-16/42

=-9/42

=-3/14

RHS

-3/14

As LHS=RHS, Hence proved

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