Question

Misha's test score decreased from 80% to 60%. What was the approximate percent decrease of Misha's test score?

Answer 1

% decrease = (old score - new score)/old score x 100 = (80 - 60)/80 x 100 = 20/80 x 100 = 25%

Answer 2

Answer:

Hence, the percent decrease is:

25%

Step-by-step explanation:

It is given that:

Misha's test score decreased from 80% to 60%.

We know that the percent increase or decrease in the test score is given as:

$Percent\ decrease=\dfrac{New\ score-Old \ score}{Old \ score}\times 100$

Let the total score be'x'.

Hence,

$old\ score=\dfrac{80}{100}\times x\\\\old\ score=0.8x$

similarly new score is:

$New\ score=0.6x$

Hence,

$Percent\ decrease=\dfrac{0.8x-0.6x}{0.8x}\times 100\\\\=\dfrac{0.2x}{0.8x}\times 100\\\\=\dfrac{2}{8}\times 100\\\\=25\%$

Hence, the percent decrease is:

25%