2.   Convert each part of the ratio to percentage:
a. 3:1        b.   2:3:5      c.    1:4        d. 1:2:5
 The population of a city decreased from 25,000 to 24,500. Find the percentage decrease
4.   Arun bought a car for ₹ 3,50,000. The next years ,the price went up to ₹3,70,000. What was the percentage of peice increases ?