Answer:
magnitude of decrease = 120 - 54 = 66$
the percentage = (66/100)×100 = 66%
Answer:
A.) 300 = $18x
B.) 277.50 = $9.25x
C.) 360 years
Step-by-step explanation:

For proportions and to find x we have to cross multiply
8 × (x) = 3 × 2.4
8x = 7.2
Divide by 8 to isolate x

8 and 8 cancels out
x = 0.9
38.5 / 1.25 = 30.8 or 77/2 divide by 5/4 = 154/5 = 30.8
so, the unit rate is 30.8