Hello Khan,
you need to write down in binary the last byte and you need to find out the last matching bit in base addresses
160 = 128 +32 -> 1010 0000
32 0010 0000
the only possible aggregate that covers both IP prefixes but also other possible prefixes is:
192.168.72.0/24 because first bit of 4th byte is different in the two base addresses
this is called a non exclusive summary route
in BGP you can use
router bgp xx
aggregate-address 192.168.72.0 mask 255.255.255.0
if this is not acceptable for you, you should advertise the IP single subnets
Hope to help
Giuseppe