Question

The ratio of blue marbles to red marbles in a bucket is 63 to 45. If there are 648 marbles, how many marbles are blue and how many are red?

Answer 1

B:R
63:45
63+45=108
to find the number of blue marbles:
63/108 * 648 = 378 blue marbles.
to find the number of red marbles:
45/108 * 648 = 270 red marbles

and to check your answer,
270+378=648