1. **State the problem:** We need to find two percentages based on the data: - Percentage of male secondary school teachers aged 30-39 among all teachers aged 30-39. - Percentage of female primary school teachers aged 45 and above among all female primary school teachers. 2. **Extract relevant data:** - Teachers aged 30-39 total: - Primary: 2,785 total - Secondary: 2,444 total - Junior College: 402 total Total teachers aged 30-39 = 2,785 + 2,444 + 402 = 5,631 - Female secondary teachers aged 30-39 = 1,728 - Male secondary teachers aged 30-39 = Total secondary - Female secondary = 2,444 - 1,728 = 716 - Female primary teachers total = 13,003 - Female primary teachers aged 45 and above = sum of females aged 45-49, 50-54, 55 & above: - 45-49: 2,228 - 50-54: 1,494 - 55 & above: 1,166 Total = 2,228 + 1,494 + 1,166 = 4,888 3. **Calculate the first percentage:** Percentage of male secondary school teachers aged 30-39 among all teachers aged 30-39: $$\frac{716}{5,631} \times 100 = \frac{716}{5,631} \times 100$$ 4. **Calculate the second percentage:** Percentage of female primary school teachers aged 45 and above among all female primary school teachers: $$\frac{4,888}{13,003} \times 100 = \frac{4,888}{13,003} \times 100$$ 5. **Perform the calculations:** $$\frac{716}{5,631} \approx 0.1272 \Rightarrow 12.72\%$$ $$\frac{4,888}{13,003} \approx 0.3759 \Rightarrow 37.59\%$$ **Final answers:** - Among all teachers aged 30-39, **12.72%** were male secondary school teachers. - Among female primary school teachers, **37.59%** were aged 45 years old and above.