Class size: 16+9+8+ 10=43.

The myopia rate of boys: 8/43 = 0.1860465 ≈18.6%.

The myopia rate of girls:10/43 = 0.23551≈ 23.3%.

The second case: the ratio of myopia of boys and girls to their corresponding boys and girls.

Total number of boys: 16+8=24.

Total number of girls: 9+ 10= 19.

The myopia rate of boys: 8/24= 1/3≈33.3%.

The myopia rate of girls: 10/ 19≈52.6%.

Remind that there are many ambiguities about the "myopia rate of boys and girls in the class". Please clarify your question, otherwise it will be difficult for people to answer. The correct expression of the question will help you get the answer you want.

Personal approval of the first case is more in line with the questioner's intention to disturb the audience.