Question

Convert to percent Rs 30 to Rs10

Answer 1

30 to Rs10 

so, (30-10)/30   X  100 = 66.66%

So, the rupees decreased 66.66%

Answer 2

30-10=20
therfore $\frac{20(100)}{30}= \frac{200}{3}=66.667$
therfore decrease in percent is 66.667%
and $\frac{10(100)}{30}= \frac{100}{3}=33.33$
therfore decreased to percent is 33.333%