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38 votes
38 votes
The money in a bank account increased from $400 to $1000.

copy and complete these sentences.

a) $1000 is ........% of $400.

b) the money has increased by .......%​

User Kameny
by
3.2k points

1 Answer

13 votes
13 votes

Answer:

a).1000/400*100

= (1000*100)/400

= 100000/400 = 250

b).600

Explanation:

a). Percentage solution with steps:

Step 1: We make the assumption that 400 is 100 % since it is our output value.

Step 2: We next represent the value we seek with x.

Step 3: From step 1, it follows that 100 % = 400.

Step 4: In the same vein, x % = 1000 .

Step 5: This gives us a pair of simple equations:

100 % = 400(1).

x % = 1000(2).

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS

(left hand side) of both equations have the same unit (%); we have

100 % / x % = 400/1000

Step 7: Taking the inverse (or reciprocal) of both sides yields

x/100 = 1000/400

x = 250 %

Therefore, 1000 is 250 % of 400.

b) $1000-$400= 600

= $400+$600=$1000

User Dekakaruk
by
3.5k points
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