es

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular Word Problems >

THe promedio class size at a Middle School is 21 students which is 30% smaller than it was a decade ago. What was the promedio class size then?

Solución

T He a v er a g e c l a ss s i ze a t a M i dd l e S c h oo l i s 21 s t u d e n t s w hi c h i s 30% s ma ll er t han i t w a s a d ec a d e a g o . Wha t w a s t h e a v er a g e c l a ss s i ze t h e n ?

Solución

Amount before reduction : 30

Pasos de solución

Translate the problem into an equation:

21 = x - 0.3 x

21 = x - 0.3 x : x = 30

Amount before reduction : 30

Ejemplos populares

36 is 0.9% of what number ?the sum of three consecutive odd integers is-315. Find the three integers.The sum of three consecutive numbers is 27. Find the numbers.What is the result when the number 14 is increased by 50%?Each side of a square piece of tissue paper is 9 centimeters long. What is the tissue paper's perimeter?