Question

Pls answer me this all question​

Answer 1

Answer:

a. $5 \frac{21}{40}$

b. $\frac{1}{42}$

Step-by-step explanation:

$a. \: 12 \frac{2}{5} - 6 \frac{7}{8}$

$\frac{62}{5} - \frac{55}{8}$

$\frac{62}{8} \times \frac{8}{8} - \frac{55}{8} \times \frac{5}{5}$

$\frac{62 \times 8 - 55 \times 5}{40}$

$\frac{221}{40}$

$5 \frac{21}{40}$

$b. \: \frac{3}{14} - \frac{4}{21}$

$\frac{3}{14} \times \frac{3}{3} - \frac{4}{21} \times \frac{2}{2}$

$\frac{3 \times 3}{42} - \frac{4 \times 2}{42}$

$\frac{1}{42}$

Hope it is helpful....

Answer 2

Answer:

A.

$5 \frac{21}{40}$

B.

$\frac{1}{42}$

Step-by-step explanation:

A )

$12 \frac{2}{5} = \frac{62}{5} \\ 6 \frac{7}{8} = \frac{55}{8} \\ = \frac{62}{5} \times \frac{8}{8} = \frac{275}{40} \\ \frac{55}{8} \times \frac{5}{5} \\ \frac{496 - 275}{40} \\ = \frac{221}{40} \\ = 5 \frac{21}{40}$

B )

$\frac{3}{14} \times \frac{3}{3} = \frac{9}{42} \\ \frac{4}{21} \times \frac{2}{2} = \frac{8}{42} \\ = \frac{9 - 8}{42} \\ = \frac{1}{42}$