Hello there! Ayden did meet his goal, since the number of square meters he completed is greater than his goal of 400.
To solve the equation, find 80% of 500. To do this, convert 80% into a fraction and multiply it by 500.
To convert a decimal into a fraction, divide by 100. 80/100 = 0.08
Now, multiply. 500 x 0.8 = 400.
We now know that his goal was 400. If he completed 415 he did meet his goal, since 415 > 400.
Hope this helps, have a great day!