Is the proportion 45=1620 true?
45=1620
multiplication of extremes = multiplication of means
If we cross multiply these fraction 4×20=16×580=80So this proportion is true.
Compare the given fraction and replace '□'by an appropriate sign '<or>'
47□49
Check whether the given are in proportion?
5,10,20,40
What number will replace '*' mark?
45=*20