What does “% is unavailable: Use truncatingRemainder instead” mean?

Question

I get the following error when using code for an extension, I\'m not sure if they\'re asking to just use a different operator or modify the values in the expression based on

Answer 1

I found that the following works in Swift 3:

    let minutes = Int(floor(totalSeconds / 60))
    let seconds = Int(totalSeconds) % 60

where totalSeconds is a TimeInterval (Double).