Do i begin with division first? do i have to invert the division? how do i solve this equation? 5/8+9/25÷18/15=

You would start with PEMDAS

Use PEMDAS. Division comes before addition. start with 9/25 ÷ 18/15. You will divide those like you would normally divide a fraction, so yes, do the inverse of 18/15 and multiply that by 9/25. after you've done that, take that answer and add the 5/8 to it.
:)

The answer would be c