How to calculate Market Share using the below data in Pivot table in Qlik Sense

[Anonymous]

Territory	Product	Month	Volume
T_1	P1	Jan	10
T_1	P2	Jan	20
T_1	P3	Jan	30
T_1	P4	Jan	40
T_1	P1	Feb	25
T_1	P2	Feb	35
T_1	P3	Feb	45
T_1	P4	Feb	55
T_1	P1	Mar	15
T_1	P2	Mar	20
T_1	P3	Mar	25
T_1	P4	Mar	35
T_1	P1	Apr	30
T_1	P2	Apr	40
T_1	P3	Apr	50
T_1	P4	Apr	60

I am Trying to calculate the Market Share at territory level. The Answer what I am expecting will be in following format. 

Territory	Product	Jan	Feb	Mar	Apr
T_1	P1	10%	16%	16%	17%
	P2	20%	22%	21%	22%
	P3	30%	28%	26%	28%
	P4	40%	34%	37%	33%
T_2	P1	10%	16%	16%	17%
	P2	20%	22%	21%	22%
	P3	30%	28%	26%	28%
	P4	40%	34%	37%	33%

I tried using multiple functions in the expression in Qlik Sense but I am not getting the correct values. Any help  is appreciated.

[sunny_talwar]

Try this

Sum(Volume)/Sum(TOTAL <Territory, Month> Volume)