Why is 20 to 40 is a 100% increase but 40 to 20 is a 50% decrease

The triangle has boon reduced by a scale of 1. What is the area of the reduced trianglo? Maria solved the area problem below. What was her error? (1) (25,5) / 30) () = 76,5cm Maria solved the area problem below. What was her error? 25.

Can someone explain how I do this

4. A dime has a diameter of 17 millimeters. Find the circumference of the dime to the nearest tenth.

Sarafina had 34 out of 99 hits at bat during the softball season. what is her batting average. How do i get results without a calculator

A bag contains 9 marbles: 3 are green, 4 are red, and 2 are blue. Martina chooses a marble at random, and without putting it back, chooses another one at random.

2x + 3y = - 14 y = 6x + 22

3$ is what percent of $12

If f (x) = x + 1/x, find f (1+3i)

The area of the small triangle is 10.5 meters squared and the area of the larger triangle is 94.5 meters squared. if the altitude of the large triangle is 9, what is the altitude of the smaller triangle

A rental car cost a total of $282 for a week. six students shared the car. how much should each pay? a. $48 b. $35 c. $50 d. $47