On Martin's first stroke, his golf ball traveled \dfrac45 5 4 start fraction, 4, divided by, 5, end fraction of the distance t
o the hole. On his second stroke, the ball traveled 797979 meters and went into the hole. How many kilometers from the hole was Martin when he started?
You can perform all kind of operation that are one the inverse of the other, so that the value won't change. For example, you can multiply and divide by 2:
