Answer:
40.5
Step-by-step explanation:
You have 90/1 times blank/blank
Since 1lb is .45 kg, you would put .45 on the denominator on the right because they are equal. Now you have to think about how you got the .45 from 1. (You multiplied 1 times .45) since you multiplied 1 times .45 to get the denominator, you have to do the same to the top and multiply 90 times .45 to get the numerator. 90 times .45 is 40.5
