Estimate 61.2 / 6.8 = ? (Show work)

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

Can anyone explain to me how to do this? anything will .

Dylan is evaluation the expression 13+19+7+10 at one step in his work, dylan rewrites the equation as 13+7+19+10 which property of addition must dylan have used when he evaluated the expression?