How do you determine whether the ratios are equivalent: #5/6#; #15/18#?

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Answer 1 · 2016-11-04T18:30:12

Use:

#a/b = c/d" " <=> " "ad = bc#

If #b != 0# and #d != 0# then:

#a/b = c/d" " <=> " "ad = bc#

In our example, (with #a=5#, #b=6#, #c=15#, #d=18#) we find:

#5*18 = 90 = 6*15#

Therefore:

#5/6 = 15/18#