#!/bin/bash

MEM_STAT=$(free -m | grep Mem | awk '{print $2,$3}')
MEM_TOTAL_MB=${MEM_STAT%% *}
MEM_USED_MB=${MEM_STAT##* }
MEM_TOTAL_GB=$(echo "scale=1;$MEM_TOTAL_MB/1024" | bc -l)
MEM_USED_GB=$(echo "scale=1;$MEM_USED_MB/1024" | bc -l)
echo "${MEM_USED_GB}/${MEM_TOTAL_GB} GB"