The Price Of A Washing Machine Is Reduced By 25 Per Cent. A Week Later, The New Price Is Reduced By A Further 20 Per Cent. These Two Reductions Are Equal To A Single Reduction Of?

Let the Original Price be P.
The first reduction of 25% means that the new price is 75% of P = 0.75P
The second reduction of 20% means that the new price is 80% of 0.75P = 80/100 x 0.75P = 0.6P

The overall reduction is therefore 1 - 0.6 = 0.4 which is 40% reduction to the original price