How to send float value from Pi to Arduino IDE through i2c

Hi guys, im pretty new to all this Pi stuff. Im currently doing a line following project and i need to send a float value from Pi to Arduino IDE. Ive searched everywhere but im stuck. Please help 😦 Ive attached below screenshots of the code im using to transmit, output of what i receive from the serial monitor and a screenshot of the console terminal of the actual value meant to be transmitted.

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