A 20% increase on 150 is:

To find a 20% increase on 150, you first need to calculate 20% of 150.

Start with the calculation of 20% of 150:

[

20% \text{ of } 150 = \frac{20}{100} \times 150 = 0.2 \times 150 = 30

]

Next, add that amount (30) to the original number (150) to find the increased value:

[

150 + 30 = 180

]

Therefore, a 20% increase on 150 results in 180, confirming that the answer is indeed correct. This calculation illustrates the straightforward process of percentage increase: determining the percentage of the original amount and then summing that increment with the original value.