you would put x over a hundred because you don't know what percent it is then you would put 180 over 240 because the other part of the prapotion is is over of. then you would cross multiply and get 7.5
this probably the right 180 is 75% of 240
180 is 75% of 240. This is calculated by dividing 180 by 240 and then multiplying the result by 100. Therefore, 180 represents 75 out of every 100 parts of 240.
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