Original 150 new 150 what’s the percent

100%

Step-by-step explanation:

if the original, 150, was 100% (which it is), and you added or subtracted to get 150 as well, nothing would change, still making it 100%

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)