Question

two numbers are 30 % and 20% less than a third number respectively. The ratio of the first two number is
a) 8:7
b) 7:6
c) 7:8
d) 3:2​

Answer 1

Step-by-step explanation:

70:80

7:8

hope this Will help you

Answer 2

Answer:

c) 7:8 is the correct answer

Step by step explanation:

Let the 3rd number be 100

Now,

$100 - 30\% \: of \: 100$

$= 100 - \frac{30}{100} \times 100$

$= 100 - 30$

$= 70$

And,

$100-20\% \: of \: 100$

$= 100 - \frac{20}{100} \times 100$

$= 100 - 20$

$= 80$

Now Ratio

$= \frac{70}{80} = \frac{7}{8}$

$=7:8$

c) Hence, 7:8 is the correct answer