Step-by-step explanation:

Simplify  20%  to  0.2.

20+5+0.2  

Simplify  20+5  to  25.  

25+0.2

Simplify.

25.2

25.2 per item correct me if im wrong

then multiply the total earn correct me if im wrong

Use the algorithm method.

                     2 5 . 2

    ×     1 0

              2 5 2 . 0

Therefore, 25.2 x 10=252.0

252.0