I have saved most of the money I earned since I started working.
I have put most of the money I made in the bank since I graduated from university.
ーI have saved most of the money I earned since I started working.
「働き始めて以来、稼いだお金のほとんどを貯金している」
to save most of the money I earned で「稼いだほとんどのお金を貯金する」
to start working で「働き始める」
ーI have put most of the money I made in the bank since I graduated from university.
「大学を卒業して以来、稼いだお金のほとんどを銀行に入れている」
to put most of the money I made in the bank で「稼いだお金のほとんどを銀行に入れる」=「貯金する」
to graduate from university で「大学を卒業する」
ご参考まで!