Question

A factory produced 150 tons of steel in one year. The next year, the output increased to 180 tons. What is the percentage increase in the output?

Answer 1

The amount of increase is  (180 - 150)  =  30 tons.

The increase as a part of the original amount is  30/150  =  0.2

To change a decimal into a percent,
move the decimal point 2 places that way  ===> .

                     0.2  =  20%