I’m having a problem with getting the correct remainder using // remainder.

[Jerson]

Using integer math

1023 / 213 = 4 remainder 171
remainder 171*100 / 213 = 80

So, adcVal1 = adcVal / 213
adcVal2 = ((adcVal // 213)*100)/213

Then print the value
This is the quick and easy way. Others might suggest more optimal techniques using PBP

[richard]

maybe like this

100/213 *256 = 120

using the */ operator
1023 */ 120 = 479

so
adcVal1 = adcVal */120

lcdout $fe, $C0, dec adcval1/100 ".",dec1 adcVal1//100