How do you get an angle sum of a triangle ?

How do you convert 1.27 to a percentage

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.