You can either buy a prebuilt module which has the inputs, logic, and LCD built in or ..... You can condition the signal so that it has an acceptable input range for an ADC. Then you can use a microcontroller to convert the digital value to an appropriate display (such as 7segment LED, etc). There are also some ADCs that directly drive 7 segment displays, but I have not used one at that voltage range. There are lots of suggestions on how to do this as it is frequently asked on this board.