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You can’t just divide by 60 — the result of that will be minutes and decimal fractions of a minute, not minutes and seconds. For example, if you divide 78 seconds by 60, you get 1.3, but 1.3 is NOT the same as 1:18 (1 minute and 18 seconds). Likewise, 247 seconds divided by 60 is 4.11, whereas 247 seconds is actually 4 minutes and 7 seconds. ................
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