Answer : 93 skateboards were in stock approximately.
Explanation:
Concept of Percentage: by a certain percent, we mean how many hundredths.
Thus, x percent means x hundredths, written as x%
To express x% as a fraction: we have, x% = x/100
If we call S, the number of skateboards that we had in stock, and now they tell us that we have sold 30% of that amount, which were 28 units, this means:
S · 30/100 = 28 units
Then, S = 28·100/30 = 2,800/30 = 93.33 => aprox. 93 units
Answer : 93 skateboards were in stock approximately.
Verification:
We can calculate 30% of 93 skateboards
93 · 30/100 = 27.9 approximately = 28 skateboards
