Question

Таня, Маша и Света собирали ракушки. Маша собрала на 50% ракушек больше, чем Таня, а Света - на 20% больше, чем Маша. На сколько процентов меньше ракушек собрала Таня, чем Света?ЗАРАНЕЕ СПАСИБО!!!

Answer 1

50+20=70
На 70 % меньше собрала Таня,чем Света?

Answer 2

Пусть Маша собрала х ракушек, тогда ятаня собрала 1-0,5=0,5х ракушек (50%=0,5).. а Света собрала 1+0,2=1,2х ракушек (20%=0,2) тогда 1,2х-0,5х = 0,7х или 70 %. Ответ: на 70% ракушек Таня собрала меньше, чем Света 2 способ :50+20=70%

Answer 3

Calculating the Difference in the Number of Shells Collected

To calculate the percentage by which Tanya collected fewer shells than Sveta, we can use the information provided about the percentage differences in the number of shells collected by each person.

Let's denote: - Tanya's shells collected as T - Masha's shells collected as M - Sveta's shells collected as S

According to the given information: - Masha collected 50% more shells than Tanya, which can be expressed as: M = T + 0.5T - Sveta collected 20% more shells than Masha, which can be expressed as: S = M + 0.2M

We need to find the percentage by which Tanya collected fewer shells than Sveta, which can be calculated using the following formula: Percentage Difference = ((S - T) / S) * 100

Let's calculate the values and find the percentage difference.

Calculation

First, let's express Masha's and Sveta's shells collected in terms of Tanya's shells: - M = T + 0.5T = 1.5T - S = M + 0.2M = 1.2M + M = 1.2(1.5T) + 1.5T = 1.8T + 1.5T = 3.3T

Now, we can calculate the percentage difference: Percentage Difference = ((3.3T - T) / 3.3T) * 100 = (2.3T / 3.3T) * 100 = (23/33) * 100 ≈ 69.7%

Answer

Tanya collected approximately 69.7% fewer shells than Sveta.