It takes 24 megabytes to store 168 songs on a music player. What is the greatest number of songs that 60 megabytes could store?

-336
-210
-420
-630



Answer :

24 / 60 = 128 / x ; where x is the  number of songs ;
x = ( 60 × 128 ) / 24 = 7680 / 24 = 320 ;
336 is the greatest number of songs ;

The answer is found by using the rule of 3 simple.
24/168 = 60/x
x = 420

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