There are fewer and fewer tourists in town nowadays.
There are quite a few less tourists in town these days.
There are far fewer tourists around these days.
この場合、次のような言い方ができますよ。
ーThere are fewer and fewer tourists in town nowadays.
「近頃、街の観光客がだんだん減ってきている」
fewer and fewer を使った言い方。
ーThere are quite a few less tourists in town these days.
「最近街の観光客がかなり減った」
quite a few less を使った言い方。
ーThere are far fewer tourists around these days.
「最近観光客の数がはるかに少ない」
far fewer を使った言い方。
ご参考まで！
カナダ 
