45 is what percent of 90?

1 Answer
Jan 19, 2017

Answer:

#45# is #50%# of #90#.

Explanation:

#45/90 = x/100#, where #x# is the percentage.

#90x = 4500 => x = 50#.

Equations of the form #a/b = c/d# can be transformed to #ad = bc#.

In general, for any #a, b# with #b!=0#, from the equation #a/b = x/100#,

#x# shows you what percentage #a# is, of #b#.