First, work out the difference(increase) between the two numbers you are comparing. So, the difference would be <em>100-80</em>, which will equal <em>20</em>.
Then, divide the increase by the original number and multiply the answer by 100. So, that would be <em>20÷100</em>, which would be <em>0.2</em>, then it would be <em>0.2⋅100</em>, so back to <em>20</em>.
The percent of increase should be 20.
Work each one out as follows
value 60 -
answer = (60 - 43.8) / 8.7 = 1.862 This is sometimes called the x score
for 40 its (40-43.8) / 8.7 = -0.4368
the others are calculated in the same way
2(3x + 9) = 8x - 4
6x + 18 = 8x - 4
22 = 2x
11 = x
Answer:
-0.8
Step-by-step explanation: