A bag contains only pink, black and yellow marbles. The ratio of pink to black marbles is 8:7.
The ratio of black to yellow marbles is 1:5.
Calculate the percentage of marbles that are black​

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle