Math Help Forum: help!

plz help! silvia hiked a 30-mile trail in 3 days. the first day, she hiked 50% of the total distance. the second day, she hiked 25% of the distance that remained. how many miles did she hike the third day?

okay, so you know the first day she did half the hike. so that is 15 miles.. the next 2 days were both 25%.. that means that on the second and third day, she split 15 miles since they are both 25%. so 7.5 miles was hiked on the third day.. does that make sense?

Silvia hiked a 30-mile trail in 3 days. the first day, she hiked 50% of the total distance. the second day, she hiked 25% of the distance that remained. how many miles did she hike the third day?

1st day: 50% * 30 = 15, so 30-15 = 15 left.
2nd day: 25% of distance that REMAINED: .25 * 15 = ?

Subtract the distance hiked on days 1 and 2 from total (30) to find distance hiked the 3rd day.

thanks! i get it now.