Posted by **lidia** on Saturday, August 18, 2012 at 2:48pm.

the sum of 2 numbers is 77. one number is 2 1/2 times as big as the other number.find the difference between the 2 addends.please show how you got your answer.

my answer is 72.6, am i right if not please tell me why and how.

- aig math -
**Steve**, Saturday, August 18, 2012 at 3:11pm
the numbers are n and 5/2 n

add them up to get 77:

n + 5/2 n = 77

7/2 n = 77

n = 22

the numbers are 22 and 55

- math -
**drwls**, Saturday, August 18, 2012 at 3:16pm
Let the two numbers be x and 2.5x. Their difference is 1.5x

3.5x = 77

x = 22

2.5x = 55

The difference is 1.5x = 33

Your answer is incorrect.

- aig math -
**corinne**, Sunday, September 30, 2012 at 4:39pm
one number form 75 is 100

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