Answer: 22
Explanation:
Step 1: Our output value is 138.
Step 2: We represent the unknown value with x
Step 3: From step 1 above,138=100%.
Step 4: Similarly, x=22\%(2)
Step 5: This results in a pair of simple equations:
Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both
equations have the same unit (%); we have
Step 7: Again, the reciprocal of both sides gives
x/138=22/100
x=30.36$
Therefore, $22\%$ of $138$ is $30.36$