0.9 of Bobby's money is equal to 40% of David's money. What is the ratio of Bobby's money to David's money?
0.9 of Bobby's money = 910 of Bobby's money
40% of David's money =
40100 of David's money =
25 of David's money
910 Bobby's money is the same as
25 David's money. Make the numerators the same. LCM of 9 and 2 is 18.
9 x 210 x 2 of Bobby's money =
2 x 95 x 9 of David's money
1820 of Bobby's money =
1845 of David's money
Bobby's money : David's money
20 : 45
(÷5)4 : 9
Answer(s): 4 : 9