Mathematics
Grade-7
Easy

Question

It was initially estimated that a wall requires 5 gallons of paint. Later the requirement was increased to 12 gallons. Determine the percent of increase in requirement of the initial estimate.

  1. 33.08
  2. 52.3
  3. 41.6
  4. 28.5

hintHint:

Percentage increase formula is the ratio of value increased to the original value and multiplied by 100. It is expressed in percentage.

The correct answer is: 41.6


    P a i n t space r e q u i r e d space f o r space t h e space w a l l space o n space t h e space i n i t i a l space s t a g e space equals space x subscript 1 space equals space 5 space g a l l o o n s
P a i n t space r e q u i r e d space a t space t h e space e n d space equals space x subscript 2 space equals space 12 space g a l l o o n s
T o space f i n d comma
I n c r e a s e space i n space p e r c e n t a g e space i n space r e q u i r e m e n t space o f space t h e space i n i t i a l space e s t i m a t e space equals space y

T h e r e f o r e comma
I n c r e a s e space i n space p e r c e n t a g e space equals space y space space equals space open parentheses x subscript 1 over x subscript 2 close parentheses space equals space 5 over 12 cross times 100 equals 0.416 cross times 100 equals 41.6 percent sign

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