Im in a test now will award !

by what percent will the product of two numbers decrease if one is decreased by 75% and the other is decreased by 20%?

The product has decreased by 80 %

Solution:

The product of the original numbers: xy

One number is decreased by 75 %

Let x be the number decreased by 75 %

new number = x - 75 % of x

Another number is decreased by 20 %

Let y be the number decreased by 20 %

new number = y - 20 % of y

Now the product is given as:

Now we have to find the percent decreased

Subtract new product and original product and then divide by original product . Multiply the result by 100 to get percentage

Here negative sign denotes decrease

Thus the product has decreased by 80 %

to find the total number of combinations, multiply the quantity of each item by each other:

2 pairs of shoes x 3 pairs of shorts = 6 different combinations.

just get this app called photo math it should be able to do those