Answer:
C) 93.4%
Step-by-step explanation:
Step 1: We make the assumption that 137 is 100% since it is our output value.
Step 2: We next represent the value we seek with x.
Step 3: From step 1, it follows that 100%=137
Step 4: In the same vein, x%=128.
Step 5: This gives us a pair of simple equations:
100% = 137(1)
x% = 128(2)
Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS
(left hand side) of both equations have the same unit (%); we have...
100% / x% = 137 / 128
Step 7: Taking the inverse (or reciprocal) of both sides yields...
x% / 100% = 128/ 137
x = 93.43%
Therefore, the answer is C
