Simplify the following ratios: 1) 14 boys to 21 girls, 2a) 80 standing to 128 seated, 2b) 128 seated to total audience (80+128)

Standing audience = 80
Seated audience = 128

The ratio of standing to seated audience is $80 : 128$.

Divide both parts of the ratio by 16.

The ratio of standing audience to seated audience is $\boxed{\text{5:8}}$.

Total audience = Standing audience + Seated audience
Total audience = $80 + 128 = 208$

The ratio of seated audience to total audience is $128 : 208$.

Divide both parts of the ratio by 16.

The ratio of seated audience to total audience is $\boxed{\text{8:13}}$.

3. Ratio of fine days to wet days in June

Number of days in June = 30
Number of wet days = 12

Number of fine days = Total days - Wet days
Number of fine days = $30 - 12 = 18$

The ratio of fine days to wet days is $18 : 12$.

Divide both parts of the ratio by 6.

The ratio of fine days to wet days is $\boxed{\text{3:2}}$.