A weather station reported 90% of the days in a 30-day period had measurable snowfall. How many of these days received measurable snowfall?

27 days.

Step-by-step explanation:

Find 1% out of the 30-day period.

100% = 30 days

1% = 30 ÷ 100 = 0.30

Now find the percentage reported that had measurable snowfall which is 90%.

90% = 0.30 x 90 = 27

Out of the 30-day period, only 27 days received measurable snow.

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