Hey there!
All you need to do for this problem is calculate what 1/5 of 1,200 is. You can do this by using the decimal version of the fraction. You can find this by dividing the numerator, 1, by the denominator, 5.
1 ÷ 5 = 0.20
Now, just multiply 0.20 by 1,200.
0.20 × 1,200 = 240
20%, or 1/5, of 1,200 is 240. We can find the resulting price by subtracting this from the original price.
1,200 – 240 = 960
The resulting price of the washing machine would be $960.
Hope this helped you out! :-)