Answer:
90%
Step-by-step explanation:
Step 1: We make the assumption that 50 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%=50.
Step 4: In the same vein, X%=45.
Step 5: This gives us a pair of simple equations:
100%=50(1)
X%=45(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% = 50/45
Step 7: Taking the inverse (or reciprocal) of both sides yields
X%/100% = 45/50
X= 90%
Therefore, 45 is 90% of 50.
