Relative frequency by row...
| Algebra | Geometry | Total
Biology | 67/92=72.8% | 25/92=27.2% | 92/92
| 73% | 27% | 100%
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Chemistry | 46/66=69.7% | 20/66=30.3% | 66/66
| 70% | 30% | 100%
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Total | 113/158=71.5% | 45/158=28.4% | 158/158
| 72% | 28% | 100%
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