Question

Calculate a) (7/12 * 3/14)+ (⅗ * 6/15)
b)13 /21 ÷ 39b/42) ×b-5/5​

Answer 1

Answer:

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Step-by-step explanation:

$(\frac{7}{12}*\frac{3}{14}) + (\frac{3}{5} *\frac{6}{15})\\\\=> (\frac{1}{8}) + (\frac{6}{25})$

now we take lcm

lcm= 25*8 = 200

$\frac{25+48}{200} \\\\=\frac{73}{200}$ ------------------------------------------- ( Answer for part a)

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$(\frac{13}{21} / \frac{39b}{42})*b* \frac{-5}{5}$

$(\frac{13}{21} *\frac{42}{39b} )*-b$

$\frac{2}{3b} * -b$

$\frac{-2}{3}$--------------------------------------------------(Answer for part b)

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mark my answer brainliest for further help and support

Answer 2

Answer:

Step-by-step explanation:

7/12 x 3/14 = 1/8 simplification

3/5 x 6/15= 18/75 no simplification

18/75 + 1/8=

18x8/75x8 + 1x75/8x75

=  144/600 + 75/600

= 69/600

= 11/100

And I hope it helps