the cost of an article is decreased by 10 % . if the original cost is $ 100 , find the decrease cost .
"original cost = $ 100 decrease in it = 10 % of $ 100 = 10 / 100 ã — 100 = 1000 / 100 = $ 10 therefore , decrease cost = $ 100 - $ 10 = $ 90 answer : e"
divide(multiply(100, 10), const_100)