option a is correct = 78 = (0.55) w
step-by-step explanation:
to find : which equation could you use to solve -seventy-eight is 55% of what number.
let the number = x
so, 55% of x =
and according to question 78=(0.55)x
from the given situation option a matches with it where x=w
therefore, option a is correct = 78 = (0.55) w