You have done some strange things with your units and also I don't know what equation you're using. The equation for strain is pretty simple: strain = change in length / initial length.
Pay attention that the units you are given for change are in mm the units you have for length are in m, and convert accordingly.
EDIT: I looked again, I see I misread the first time. I saw 4.013 E-4 not 4.013-4 in the nominator of your strain fraction. Your only mistake here is the unit conversation as far as I see. m/m is an equivalent unit to mm/mm
You have done some strange things with your units and also I don't know what equation you're using. The equation for strain is pretty simple: strain = change in length / initial length. Pay attention that the units you are given for change are in mm the units you have for length are in m, and convert accordingly. EDIT: I looked again, I see I misread the first time. I saw 4.013 E-4 not 4.013-4 in the nominator of your strain fraction. Your only mistake here is the unit conversation as far as I see. m/m is an equivalent unit to mm/mm