Her ratio of Wii Games to PS3 Games is 8:4. However, this can be simplified to the ratio 4:2, or fully simplified to the ratio 2:1.
Keep in mind that these ratios can also be written as 2 to 1, or 2/1.
1.5 +.15 = 1.65. 10% x 15 + 1% x 15
The answer is -42. A negative times a negative is a positive and a negative times a positive is a negative. If you multiply -6 x -7 you get 42. Then do 42 x-1 and you get -42.