How to slice an array value to get only the last 2 character in that array – JavaScript

I have an array, arr = [{number1: 1523, number2: 43677, number3: 643}].
How to slice this array to get only the last 2 character. I hope receive result like this:
arr = [{number1: 23, number2: 77, number3: 43}].
Thank you!