Question

Marcus mixes 5 parts white paint with 2 parts red paint to make pink. Suppose he adds one part of each. What is the new ratio of red to white?

Answer 1

The original ratio  is 5/2.
If Marcus adds 1 part of each to the mixture, the new ratio of red to white becomes 

5+1         6       2
------ = ----- =  ----
2+1         3       1

The new ratio of red to white is 2:1.

Answer 2

New ratio of red to white is 1:2

Given that;

Old part of white paint = 5

Old part of red paint = 2

Added 1 part to each

Find:

New ratio of red to white

Computation:

New ratio of red to white = [2 + 1] / [5 + 1]

New ratio of red to white = 3 / 6

New ratio of red to white = 1 / 2

New ratio of red to white = 1:2

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