In Hawaii, they normally get an average of 2 inches of rain a day. With 100 days left in the year, they've gotten 430 inches of rain. How many inches on average do they need to finish the year with the normal average?
They need 730 inches of rain a year to average 2 inches a day because 365 x 2 = 730
They need 300 more inches because 730 - 430 = <<730-430=300>>300
They need 3 inches a day because 300 / 100 = <<300/100=3>>3
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