Answer :
To convert a temperature in Fahrenheit to Celsius, you use the formula
[tex]$$
C = \frac{5}{9}(F - 32).
$$[/tex]
Barbara started by subtracting 32 from 78, which gives
[tex]$$
78 - 32 = 46.
$$[/tex]
The next step is to multiply this result by [tex]$\frac{5}{9}$[/tex]. That is,
[tex]$$
46 \times \frac{5}{9}.
$$[/tex]
This multiplication converts the remaining difference into degrees Celsius.
[tex]$$
C = \frac{5}{9}(F - 32).
$$[/tex]
Barbara started by subtracting 32 from 78, which gives
[tex]$$
78 - 32 = 46.
$$[/tex]
The next step is to multiply this result by [tex]$\frac{5}{9}$[/tex]. That is,
[tex]$$
46 \times \frac{5}{9}.
$$[/tex]
This multiplication converts the remaining difference into degrees Celsius.