The principles for subnetting class B addresses are exactly the same as for class C.  You just need to remember that the default subnet mask for class B addresses is 255.255.0.0, so the subnetting will take place from the third octet onwards.

Here are all the possible class B subnets:

# Bits	Subnet Mask	CIDR	# Subnets	# Hosts
0	255.255.0.0	/16	1 (network)	65534
1	255.255.128.0	/17	2	32766
2	255.255.192.0	/18	4	16382
3	255.255.224.0	/19	8	8190
4	255.255.240.0	/20	16	4094
5	255.255.248.0	/21	32	2046
6	255.255.252.0	/22	64	1022
7	255.255.254.0	/23	128	510
8	255.255.255.0	/24	256	254
9	255.255.255.128	/25	512	126
10	255.255.255.192	/26	1024	62
11	255.255.255.224	/27	2048	30
12	255.255.255.240	/28	4096	14
13	255.255.255.248	/29	8192	6
14	255.255.255.252	/30	16384	2