Marcus went on a diet and now weighs 140 lb he originally weighed 175 lb what percent of his weight did he lose

20%

hope that helps i know its not too much detail but if you need it just ask

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have