The denominator of a fraction is 4 more than the numerator. If both the numerator and the denominator are decreased by 2​, the resulting fraction is equivalent to 9/13. Find the fraction.

i think its 11/15 because if both the denominator and numerator decrease by 2 then you just add 2 to the answer

I'm not sure if this is correct

its a little blurry tbh

step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.