Why the answer is 10% and not 7% I am confused and how question can be rephrased if answer needs to be 7%.What is the difference
Two numbers are less than a third number by 30% and 37 % respectively. How much percent is the second number less than the first?
a) 10 % b) 7 % c) 4 % d) 3 %
Solution: .7 & .63
diff in %= (.7 - .63)/.7 * 100= .07/.7 * 100= 10%
Can You please explain this
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Consider Thrid number as 100 (say).navdeepbajwa wrote:Why the answer is 10% and not 7% I am confused and how question can be rephrased if answer needs to be 7%.What is the difference
Two numbers are less than a third number by 30% and 37 % respectively. How much percent is the second number less than the first?
a) 10 % b) 7 % c) 4 % d) 3 %
Solution: .7 & .63
diff in %= (.7 - .63)/.7 * 100= .07/.7 * 100= 10%
First number is less than 3rd number by 30% ==> 70
Second number is less than 3rd number by 37% ==> 63
Second number is less than first by what?
Here, take percent change b/w second and first.
i.e. (70-63)/70 ==> 1/10 or 10%
Hope this helps
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This is the percentage change formula. Let me give a few examples on this,navdeepbajwa wrote:I can't understand this part
diff in %= (.7 - .63)/.7 * 100
why we have to divide by 0.7 why can't it be difference * 100 = 7%
thanks
For example, in 1990, sales is 10,000 and in 1991, sales increased to 11,000. If you are asked to find the % increase in sales, then
% sales increase = (11,000 - 10,000)/10,000 = 10%
Consider this, in 1990, sales is 10,000 and in 1991, sales increased to 9,000. If you are asked to find the % decrease in sales, then
% sales decrease = (10,000 - 9,000)/9,000 = 11.11%
This formula applies not only to integers (such as 10k, 11k). This applies for percentages as well (as is the case in this prob).
Hope this helps!
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