Exercise $4$

Russian Rubble $($RUB$)$ was trading on

${25}^{th}$ February $2022$:$83\mathrm{.}82$ RUB $\frac{?}{?}$$

and if the recent unrest between Russia and Ukraine, has led RUB to discount at $28\mathrm{.}63\%$ in March. What is the approximate value of RUB$/$$ in March?