Emily has saved $74 toward a new sound system that costs $149. She plans on saving an additional $15 each week. How many weeks w
1 answer:
You might be interested in
Answer:
C.
Step-by-step explanation:
To find the number of black ribbons one would have subtract the amount of red ribbons from the total number of ribbons. Then one would have to express it as a proportion. Part over whole equals percent over 100. The number of black ribbons over total ribbons equals "b" over 100.