01. Introduction
02. Per-thousand
03. Examples 1 to 5
(16) (i) If the diameter of a circle increases by 30%, its circumference will increase by how many percentage ?
(ii) In above example area of the circle will increase by how many percent ?
Soln.
(11) The value of a machine depreciates at the rate of 10 % per annum. If its present value is Rs. 8100, what will be its worth after 2 years ? What was the value of the machine 2 years ago ?
Value of the machine a…
(6) What percent is :
(i) 120 of 80 (ii) 125 ml. of 7.5 litres (iii) 10 gm of 1 kg ?
Soln. (i) Let, x % of 80 = 120
(1) Express each one of the following as a fraction :
(i) 55 % (ii) 0.3 % (iii) 0.08 %
(i) 55 % =
☼ Per-thousand :
l = Per-thousand =
i.e. x l =
☼ Percent :
% = Percent = per hundred =