Question

if the price of gold increases by 30%,find by how much the quantity must of ornaments must be reduced so that the expenditure remains same as before

Answer 1

Answer:

If x is initial price and y is initial quantity, then amt spent = x*y

now 1.3 x is gold price and f*y is final quantity such that

x*y = 1.3*x*f*y

then f = 1/1.3= 0.769

reduction in quantity = 1-0.769 = 0.231

so quantity of ornaments should be reduced by 23.1 %

Ans is 23 1/3%

Answer 2

Answer:

100(R) / (100+R)

= 100×30/130

= 23 ⅓