In a colored picture of blue and yellow color, blue and yellow color is used in the ratio of 4 : 3 respectively. If in upper half ratio of blue and yellow color is 2 : 3, then find that ratio in the lower half.

26 : 9

                    Blue   :    Yellow               

Full picture:     4     :       3       = 7 (total)    .......(i)

Upper Half :    2      :      3        = 5 (total)   .......(ii)     

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Here, note that the total color (blue + yellow) in upper half and lower half should be same and in full picture total color is twice than the upper/lower half.

So, to make the total of full picture and upper half in the ratio of 2 : 1, multiply (i) by 10 and (ii) by 7:

                    Blue    :    Yellow               

Full picture:    40    :       30       = 70 (total)    .......(iii)

Upper Half :   14     :       21       = 35 (total)   .......(iv)        

Lower half :   26     :       9                 (Full picture - upper half)