Answer :

rate of increase = change in the value of the number / initial number = (70.5-47)/47 = 23.5/47 = 0.5 = 50%
kate200468
[tex] \frac{70.5-47}{47} \cdot100\%= \frac{23.5}{47} \cdot100\%= \frac{2350\%}{47} =50\%\\\\Ans.\ the\ rate\ of\ increase\ is\ 50\%[/tex]