The number of illiterate persons in a country decreased from 150 lakhsto 100 lakhs in 10 years. What is the percentage of decrease?

The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years.What is the percentage of decrease?

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

In an NGO the daily average wages of 20 illiterate employees is decreased from ₹25 to ₹10 thus the average salary of all the literate and illiterate employees is decreased by ₹10 per day . The number of educated employees working in NGO is :

A number is increased first by 10% and then it is decreased by 10% .What is the percentage change in the number ? (a) 11% increase (b)No change (c) 1% decrease (d) 11% decrease

A number is decreased first by 30% and then it is again decreased by 30%. What is the percentage change in the number?

If the radius of a circle is decreased by 10%, then what will be the percentage decrease in the area of circle?