0.1 of Mark's money is equal to 90% of Jack's money. What is the ratio of Jack's money to Mark's money?
0.1 of Mark's money = 110 of Mark's money
90% of Jack's money =
90100 of Jack's money =
910 of Jack's money
110 Mark's money is the same as
910 Jack's money. Make the numerators the same. LCM of 1 and 9 is 9.
1 x 910 x 9 of Mark's money =
9 x 110 x 1 of Jack's money
990 of Mark's money =
910 of Jack's money
Jack's money : Mark's money
10 : 90
(÷10)1 : 9
Answer(s): 1 : 9