induction motor speed based on frequency, voltage? i can't gasp the concept of motors power drawz torque and impedance

Gpt isn't providing reasonably satisfactory answers.

I have a stand fan with a single phase AC induction motor (squirrel cage and running capacitor), in theory the rpm (considering the same speed settings are dialed in) is dependent on poles and electrical frequency.

now in case when voltage moves from 240 to 200 , the motor slows down , shouldn't it maintain the speed.

TIA