Average foreign exchange reserves over the given period = 3480 million US $.

The country had reserves above 3480 million US $ during the years 1992-93, 1996-97 and 1997-98, i.e., for 3 years and below 3480 million US $ during the years 1991-92, 1993-94, 1994-95, 1995-56 and 1998-99 i.e., for 5 years.

Hence, required ratio = 3 : 5.

There is an increase in foreign exchange reserves during the years 1992 - 1993, 1994 - 1995, 1996 - 1997, 1997 - 1998 as compared to previous year (as shown by bar-graph).

The percentage increase in reserves during these years compared to previous year are:

For 1992 - 1993 =		(3720 - 2640)	x 100		% = 40.91%.
		2640

For 1994 - 1995 =		(3360 - 2520)	x 100		% = 33.33%.
		2520

For 1996 - 1997 =		(4320 - 3120)	x 100		% = 38.46%.
		3120

For 1997 - 1998 =		(5040 - 4320)	x 100		% = 16.67%.
		4320

Clearly, the percentage increase over previous year is highest for 1992 - 1993.

Average foreign exchange reserves over the given period

=		1	x (2640 + 3720 + 2520 + 3360 + 3120 + 4320 + 5040 + 3120)		million US $
		8

= 3480 million US $.

Foreign exchange reserves in 1996 - 1997 = 4320 million US $.

Required percentage =		4320	x 100		% = 124.14% 125%.
		3480

Foreign exchange reserves in 1997 - 1998 = 5040 million US $.

Foreign exchange reserves in 1993 - 1994 = 2520 million US $.

Increase = (5040 - 2520) = 2520 US $.

Percentage Increase =		2520	x 100		% = 100%.
		2520