Three times a number increased by 15 and decreased by 20 gives 40. Find the number
Answers
Answered by
0
Step-by-step explanation:
Let the number be =100
Increase in the number =20% of 100=
10020×100 =20
Increased number =100+20=120
The resulting number decreased by 15%
Decrease in the number = 12020 ×120 =24
New number =120−24 =96
Now, net decrease =100−96
Net % decrease = Original number
Net decrease×100 = 1004 ×100
=4%
Hence the net percent decrease is 4%.
Hope its help..
Answered by
2
Step-by-step explanation:
Let the number be =100
Increase in the number =20% of 100
=
100
20
×100
=20
Increased number =100+20
=120
The resulting number decreased by 20%
Decrease in the number =
120
20
×120
=24
New number =120−24
=96
Now, net decrease =100−96
Net % decrease =
Original number
Net decrease
×100
=
100
4
×100
=4%
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