Ashirt originally cost $50.97, but it is on sale for $40.78. what is the percentage decrease of the price of the shirt? if necessary, round to the nearest percent.

20% decrease.

Step-by-step explanation:

difference over original

50.97-40.78= 10.19

diff/orig=sales tax

10.19 / 50.97= 19.99..

19.99 is approximately 20.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13