Question

Decrease 500 by 40%.​

Answer 1

Answer:

40 percent of 500 = (40/100) × 500 = 200.

500 decreased by 40 percent = 500-200 = 300

Answer 2

Answer:

500, percentage decreased by 40% (percent) of its value = 300

Step-by-step explanation:

Percent (%)' means 'out of one hundred':

p% = p 'out of one hundred',

p% is read p 'percent',

p% = p/100 = p ÷ 100.

40% = 40/100 = 40 ÷ 100 = 0.4.

100% = 100/100 = 100 ÷ 100 = 1.

Decrease number by 40% of its value.

Percentage decrease = 40% × 500

New value = 500 - Percentage decrease

Calculate the New Value

New value =

500 - Percentage decrease =

500 - (40% × 500) =

500 - 40% × 500 =

(1 - 40%) × 500 =

(100% - 40%) × 500 =

60% × 500 =

60 ÷ 100 × 500 =

60 × 500 ÷ 100 =

30,000 ÷ 100 =

300

Calculate absolute change (actual difference)

Absolute change (actual difference) =

New value - 500 =

300 - 500 =

- 200

Calculate percentage increase...

... And see if we get as a result

the absolute change (actual difference).

Percentage decrease =

40% × 500 =

40 ÷ 100 × 500 =

40 × 500 ÷ 100 =

20,000 ÷ 100 =

200

So we have proven that the calculations are correct.

For positive numbers

Absolute change (actual difference) =

- 1 × Percentage decrease

Answer:

500 decreased by 40% = 300

Absolute change (actual difference):

300 - 500 = - 200

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