Calculate row % by subgroup in pivot table

[akswartz85]

How do I calculate row percentage by subgroup within a pivot table?

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COUNT of diploma_ontime	diploma_ontime	s_male
	0		0 Total			Total	1		1 Total	Grand Total
hs_name1	0	1		0	1		0	1
Hope High School	0.7%	1.1%	1.8%				51.8%	46.4%	98.2%	100.0%
James High School	0.7%	1.7%	2.3%		0.0%	0.0%	52.1%	45.6%	97.7%	100.0%
Juniper High School	0.6%	2.2%	2.8%	0.0%		0.0%	52.8%	44.4%	97.2%	100.0%
Kennedy High School	1.3%	3.1%	4.3%		0.0%	0.0%	55.6%	40.0%	95.7%	100.0%
King High School	0.9%	2.4%	3.4%				50.7%	46.0%	96.6%	100.0%
Lincoln High School	0.6%	0.5%	1.1%				55.3%	43.6%	98.9%	100.0%
Meadowbrook High School	1.4%	1.6%	3.0%				50.2%	46.8%	97.0%	100.0%
North Falls High School	0.5%	1.1%	1.6%				50.6%	47.7%	98.4%	100.0%
Orange High School	0.5%	1.4%	1.9%				50.9%	47.3%	98.1%	100.0%
Polk High School	0.9%	1.2%	2.2%		0.0%	0.0%	52.2%	45.6%	97.8%	100.0%
South Falls High School	0.2%	1.4%	1.6%		0.0%	0.0%	51.3%	47.2%	98.4%	100.0%
Upper Hills High School	1.7%	2.2%	3.9%				56.8%	39.4%	96.1%	100.0%
Washington High School	0.9%	1.0%	1.9%		0.0%	0.0%	53.7%	44.3%	98.1%	100.0%
Grand Total	0.8%	1.5%	2.3%	0.0%	0.0%	0.0%	52.4%	45.4%	97.7%	100.0%

<colgroup><col style="width: 178px"><col width="171"><col width="152"><col width="112"><col width="58"><col width="152"><col width="112"><col width="100"><col width="100"><col width="100"><col width="100"></colgroup><tbody>
</tbody>

Right now, it is calculating the percentage by the total row, but I want it totaled by the subgroup (i.e. by the total diplomal_ontime= 0 and then diploma_ontime = 1).

Is that possible?