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Maksim231197 [3]
3 years ago
6

At first it increased by 25% and then decreased by 40%

Mathematics
1 answer:
Makovka662 [10]3 years ago
4 0

Answer: 12%


Step-by-step explanation:

Let the original salary be Rs a


Salary after increase = a + 40% of a


= a + 40a/100


= 140a/100


= 14a/10


= 7a/ 5


Salary after Decrease = 7a/5 - 20% of 7a/5


= 7a/5 - 20× 7a / 100 × 5


= 7a/5 - 7a/25


= ( 35a - 7a) / 25


= 28a/25


Absolute increase = 28a/25 - a


= 3a/25


Percentage = 3a/25 ×100 / a


= 3 × 4


= 12%

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