Question

WILL GIVE MEDAL,Which mixed number is equal to 80.78?

Answer 1

As a start, split the given number into integer and fractional parts :
\[80.78 = 80 + 0.78 \]

Answer 2

next work on the fractional part
try multiplying it by \(\frac{100}{100}\)

Answer 3

how

Answer 4

\[\begin{align}80.78 &= 80 + 0.78 \\~\\
&= 80 + 0.78 \times \dfrac{100}{100} \\~\\
&= 80 + \dfrac{78}{100}

\end{align}\]

Answer 5

cancel any common factors in that fraction ^

Answer 6

looks 2 goes in both 78 and 100, eh ?

Answer 7

\[\require{cancel}\begin{align}80.78 &= 80 + 0.78 \\~\\
&= 80 + 0.78 \times \dfrac{100}{100} \\~\\
&= 80 + \dfrac{78}{100}\\~\\
&= 80 + \dfrac{\cancel{78}^{39}}{\cancel{100}^{50}}\\~\\
&= 80 + \dfrac{39}{50}\\~\\
&= 80 \dfrac{39}{50}\\~\\

\end{align}\]

Answer 8

see if that makes more or less sense