Jenny gets a salary increment of 20%. She gives 1 5 of her new salary to her mother and spends another 40%. If she has RM600 left,what is her original salary?
1.2s (1 - 1/5 - 0.4)
= 6/5 s (2/5) = 600
12/25 s = 600
s = 1250
1041.67
To find Jenny's original salary, let's work through the problem step by step:
1. Let's assume Jenny's original salary as "X" (in RM).
2. After the salary increment of 20%, her new salary becomes 1.2 times her original salary. So her new salary is 1.2X (in RM).
3. Jenny gives 1/5 (or 20%) of her new salary to her mother. This means she has (1 - 1/5) = 4/5 (or 80%) of her new salary remaining.
4. Jenny spends another 40% of her new salary. After this expenditure, she has (1 - 0.40) = 0.60 (or 60%) of her new salary left.
5. The remaining amount of her new salary, or 0.60 * (1.2X), is equal to RM600.
Now we can set up the equation and solve for X:
0.60 * (1.2X) = RM600
First, simplify the equation:
0.72X = RM600
Divide both sides of the equation by 0.72:
X = RM600 / 0.72
Calculating the division:
X ≈ RM833.33
So, Jenny's original salary was approximately RM833.33.