YOU SAID:

There were three red balloons on the race car and one of them was popped by my younger brother

INTO JAPANESE

レースカーには3つの赤い風船があり、そのうちの1つは私の弟によって飛び出されました。

BACK INTO ENGLISH

The race car had three red balloons, one of which was thrown out by my brother.

INTO JAPANESE

レースカーには3つの赤い風船があり、そのうちの1つは私の兄弟によって投げ出されました。

BACK INTO ENGLISH

The race car had three red balloons, one of which was thrown out by my brother.