Question

original price.
. After spending 80% of his income and giving 10% of the remainder in a charity, a man has
46260 left with him. Find his income.
A number is increased by 20% and the increased number is decreased by 20%. Find the net​

Answer 1

Answer:

4 %

Step-by-step explanation:

let the number be = 100

increased number= 20% of 100 = 20/100*100

= 20

increase number= 20 + 100 = 120

decrease number= 20 % of 120 = 20/100*120

= 24

new number= 120 - 24 = 96

net decrease= 100-96 = 4

net% decrease = ( net decrease/original number*100) %

= ( 4/100 * 100) %

decrease = 4 %

Answer 2

Answer:

Step-by-step explanation:

1) let x be his income

80% of it is spent

so left is

x - 80x/100=  x/5 = y

now again from that 10% is spent on charity

so left is

y - 10y/100

9y/10

put y = x/5

9x/500

so the left over money is 9x/500=46260-----------(from question)

x = 5,14,000

so

the person's income is 5,14,000

2)

let the no. be 100

20% increase in 100

100 + 20 x 100/100

100 + 20

120

20% decrease in 120

120 - 20 x 120/100

120 - 24 = 96

obviously

96% of 100 is 96

so the net percentage is 96%

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