It is literally not clear. OP could mean that they read hundredths of lines of code for each code they write ie 100 lines of code written and 1-3 lines read. That is in fact literally what they wrote.
I read hundredths (100ths) of lines of code for one line of code I write.
My last PR of three lines of code moved into conditional tasked me to read about 8000 lines of code to understand and justify the reason to do exactly that.