What is the ratio of the number of Nokia cellular phones sold by store S to the Samsung cellular phones sold by store T and U together?

What is the ratio of the number of Nokia cellular phones sold by store S to the Samsung cellular phones sold by store T and U together? Correct Answer 49 : 76

Store Nokia Cellular Phones Samsung Cellular Phones Total Number of Cellular Phones
P 896 672 1568
Q 840 280 1120
R 1120 896 2016
S 1568 1344 2912
T 448 1792 2240
U 704 640 1344

Number of Nokia phones sold by store S = 1568
Number of Samsung Phones sold by store T and U together
  = 1792 + 640
  = 2432
$$\eqalign{& \therefore \text{ Required ratio} \cr& = \frac{1568}{2432} \cr& = \frac{49}{76} \cr& = 49:76 \cr} $$
Bissoy MCQ

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The number of Nokia cellular phones sold by store R is what percent more than that of Samsung cellular phones sold by store P and Q together?