7+5×(1/4)2 -6÷(2-3)=
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³¹/₂  

Step-by-step explanation:

This is an exercise in PEMDAS, the order of arithmetic operations:  

parentheses > exponents > multiplication and division > addition and subtraction.  

                                 7 + 5 × (¼)2 -  6 ÷ (2 - 3)

Parentheses: = 7 + 5 × (¼)2 -  6 ÷ (-1)

Multiplication: = 7 +       ⁵/₂    -  6/(-1)

        Division: = 7 +       ⁵/₂   - (-6)

       Addition: =            ¹⁹/₂   - (-6)

  Subtraction: =            ¹⁹/₂   +  6

       Addition: =            ³¹/₂

b

step-by-step explanation:

the total is 23.97. 0.25% is off so you have to subtracting 25% from 100% and you will get 75% if you convert it to decimal you will get 0.75. you have to find the original because the formula is % times original = total.so you have the total and the % so you just have to plug it in.