Mapping float to int

Hello.

I would like to map a float variable which is a sine wave that ranges from -100.00 to +20.00 to a 16 bit unsigned int between 743 and 3717. The issue i am having is that the int will only change when the float value changes by a whole number. The value of "dewpoint" is calculated from humidity and temperature which are sent over I2C from another device.
SendingDew = map(dewpoint, -100.0, 20.0, 743, 3717);

I would appreciate any advice, Thank you.

Multiply the float by 100 and use the new value in map()

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Thank you :smiley: