Johnetta simplified seven over nine divided by three over eight.; her work is shown below. Identify where she made her error.

Original division problem: seven over nine divided by three over eight.

Step 1: seven over nine multiplied by three over eight.

Step 2: seven times three over nine times eight.

Step 3: twenty-one over seventy-two.

Step 4: seven over twenty-four.

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

How is working backward similar to solving an equation?

Find two numbers if their sum is 91 and the ratio is 6: 7?