How to turn repeating decimals to fractions.

Two blends of tea are mixed to make a blend that will be sold at the fair. black tea sells for $2.20 per pound and orange pekoe tea sells for $3.00 per pound. how much of each should be used to obtain a 4lb blend selling for $2.50 per pound?

41/17 as a decimal rounded to the nearest hundredth

Find the interior angle of a regular polygon which has 6 sides