I'll do the first two problems to get you started. All problems shown will use the same formula.
===========================================
Problem 4
The formula to use is
C = 100*(B-A)/A
where
A = old value
B = new value
C = percent change
In this case, A = 12 and B = 36, so
C = 100*(B-A)/A
C = 100*(36-12)/12
C = 100*(24/12)
C = 100*2
C = 200%
We have a 200% increase. It is an increase because the value of C is positive.
===========================================
Problem 5
Use the same formula as in the previous problem. This time,
A = 75 is the old value
B = 25 is the new value
C = 100*(B-A)/A
C = 100*(25-75)/75
C = 100*(-50/75)
C = 100*(-2/3)
C = -66.6667%
C = -66.7%
The value of C is negative, so we have a percent decrease of roughly 66.7%
Answer:
Step-by-step explanation:
Comma comma comma comma
The product would be 40.
First, solve what is in parenthesis (). (4x2) is equal to 8. 5 x 8=40, so
5 x (4 x 2) = 40
The product of a number and its multiplicative inverse is 1.
12x/5 * 5/12x = 1
Therefore, the multiplicative inverse of 12x/5 is 5/12x
