As a result of the installation of a muffler, the noise level of an engine was reduced from 89 to 72 decibels. Find the percent
decrease in the intensity level of the noise due to the installation of the muffler.(Round your answer to the nearest whole number
1 answer:
Answer:
Step-by-step explanation:
Using the formula
Initial -final/initial =%/100
89-72/89 =%/100
17/89 =%/100
Making %subject of the formula
% =17*100/89
So % =1700/89
%= 19.101
Therefore rounding off the answer we have
X=19%
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