The clock is 3 3/5 minutes behind per day. How many minutes will they be behind in 2/3 days?

Once a day they are 3 3/5 behind, then in order to find the lag on a certain part of the day, you need to multiply this number by a part of the day.
18/5 * 2/3 = 36/15 = 2.4 minutes



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