If a shirt selling for $18 is marked upto $20 then the % increase is equal to
a. 11%
b. 10%
c. 12%
d. 9%
​

11%

Step-by-step explanation:

it is a simple question, whenever you need to find % increase or % decrease.

always divide the increase as in this case $2 by the original amount which is $18 and multiply it by 100 as you need to take the %.

so,

2/18*100 gives you 11.11%      * is multiply  

Step-by-step explanation:

$20 - $18 = $2

to get % of increase we need to know what % of $18 the $2 are.

$2 ÷ $18 = 0.11111111

Multiply this number by 100 and you will get the percentage.

0.111111111111 x 100 = 11.1111111111%

step-by-step explanation:

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