An$wer:
$700
Explanation:
7/8 * 800 = 7/8 * 800/1
= 7 * 800/8 * 1 ( 800 and 8 are simplified to 100 and 1 )
= 7 * 100 / 1* 1
=700/1 = 700
6.5m questions
8.6m answers