FDP's Flashcards
1
Q
Percents: A dress is marked up 16 2/3 % to a final price of $140. What is the original price?
A
16 2/3 % is equivalent to 1/6. Adding 1/6 of a number to itself is the same thing as multiplying by 1 + 1/6 (or in any case x/x).
Call original price x:
(7/6)x = 140
X=120
2
Q
Fractions: simplifying “double-deckers”
A
Multiply both top (numerator) and bottom (numerator) by a common denominator
3
Q
Complex fractions
A
Don’t split the denominator.
Example: 15+10/5+2
Remember this rule when simplifying fractions: I may split up the terms in the numerator, but I may NEVER split the terms in the denominator.
