Calendar or duration rule
minutes = seconds ÷ 60.
Use the minutes/seconds breakdown when a clock-style duration is easier to read.
Worked check
For 150 seconds, divide by 60 to get 2.5 minutes. That is 2 minutes 30 seconds in clock-style notation. Keep the decimal and clock-style representations separate when copying the result into another calculation.
Rule: minutes = seconds ÷ 60. Use the minutes/seconds breakdown when a clock-style duration is easier to read. For a final check, distinguish calendar arithmetic from elapsed duration, confirm the intended local date or time zone, and inspect month-end, leap-year or daylight-saving boundaries when they can affect the meaning.