math word problem

Question

accidents were reduced by 20% to 12. how many accidents were there in the beginning?

Answer 1

If X was reduced by 20% and is now 12, then 

 

X - 0.2X = 12

1X - 0.2X = 12

X (1-0.2) = 12

0.8X = 12

X = 12/(0.8)

X = 15 accidents