Answer: 72%
Step-by-step explanation:
Set Jamal's original ring price = x

Jamal's original ring price = $3300
Set Naomi's discount = y

Naomi's discount is 0.72 = 72%
20+4x=76 subtract 20 from both sides
4x=56 divide both sides by 4
x=14
So he was driving at 55+14=69 mph