How to find number if percentage is known

Question

10.5% = 1.0 and 100% = 9.0 How to find number which is equal to 27.36% from this range?

Answer 1

Simple. If you meant $100\%=9$, then

$$27.36\%=\frac{27.36}{100}\times100\%=0.2736\times9=2.4624$$

If, however, you meant $10.5\%=1$, then

$$27.36\%=\frac{27.36}{10.5}\times10.5\%=2.6057$$