Increase of a number from 150 to 162 is equal to increase of _________ per cent.

a number is increased by 20% and the increased number is decreased by 20% find the net increase or decrease per cent

In 1975, the consumption of water for human use was about 3850 cu.km/year. It increased to about 6000 cu.km/year in the year 2000. Find the per cent increase in the consumption of water from 1975 to 2000. Also, find the annual per cent increase in consumption (assuming water consumption increases uniformly).

The simple interest on a sum of money is 1/9 of the principal and the number of years is equal to rate per cent per annum . The rate per annum is

When 30 percent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number?

Commodities A and B have equal price elasticity of demand . The demand of X rises from 100 units to 150 units due to a 20 per cent fall in its price. Calculate the percentage fall in demand of Y if its price rises by 8 per cent.

A number is increased by 20% and then it is decreased by 10%. Find the net increase or decrease per cent.

If the height of a cylinder is increased by 15 per cent and the radius of its base is decreased by 10 per cent then by what precent will its curved surface area change ?

The simple interest on a sum of money is (1)/(9) th of the principal, and the number of years is equal to the rate per cent per annum. Find the rate per cent.

The simple interest on a sum of money is 1/16 of the principal and the number of years is equal to the rate per cent annum. Find the rate per cent.

The simple interest on a sum of money is 1/144 of the principal and the number of years is equal to the rate per cent per annum. What will be the rate per cent per annum?