21 x 3 + (32- 11) + 6 x (15/5) =

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Grades 6, 7 and 8 - Math - Middle School - Algebra - Percentage Operations (Advancing) — practice the complete quiz, review flashcards, or try a random question.

Some algebraic problems will ask you to find an unknown percentage increase or an unknown percentage decrease between two known factors. An unknown factor is a variable.  

When asked to find a percentage increase or decrease, use the following formula:
The % increase or decrease = the difference between the known factors divided by the base factor.  Now let’s work this out in a practice problem below.
 


21 x 3 + (32- 11) + 6 x (15/5) =