Robert mixed 113 liters of blue paint with 123 liters of red paint to make 3 liters of purple paint. To make a new batch of purple paint he used 2 liters of red paint. Using the same ratio, Robert should use Response area liters of blue paint .

Step-by-step explanation:

Given

Required

Determine the amount of blue paint when Red = 2

To do this, we make use of the following equivalent ratios

When   and  

When Red = 2

Equate both ratios

Convert to division

Convert fractions to improper fraction

Make Blue the subject

.25

step-by-step explanation:

so, converting firstly the mixed fractions to improper fractions and then "adding".