Question

Dmitry practices his domra for 98 min during the school week. this is 70% of the time he must practice his instrument in one week

Answer 1

Let the total time is x min

Since he practices for 98 min

Since this amount of time = 70% of his total time

Since his total time is x

70% x (x) = 98

Divide 70 by 100 to change it from percent to decimal

`(70)/(100)=0.70`

0.70 x (x) = 98

Divide both sides by 0.70 to find x

`\begin{gathered} (0.70x)/(0.70)=(98)/(0.70) \\ x=140 \end{gathered}`

The total time of he practices in is 140 min