Amy cut off two ninths of a board. The remaining piece was 4.69 m long. a. How long was the board originally

Question

I need to know what f the wander to my question is right 

Answer 1

Let's say that the original length of the board is B.

We started out with a whole length of B, then we subtracted 2/9^ths of that to give us 4.69m

B - (2/9)×B = 4.69

(9/9)×B - (2/9)×B = 4.69

((9-2)/9)×B = 4.69  , we can just subtract the tops of the fractions because the bottoms are the same

(7/9)×B = 4.69

B = 4.69÷(7/9)

B = 4.69×(9/7)  , dividing by a fraction is the same as multiplying by that fraction flipped around

B = 4.69×9/7  , follow Order of Operations (PEMDAS)

B = 42.21/7

B = 6.03 m

Hope you found this helpful

-Frank