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