Answer: 8
Explanation:
Calculations:
20 ⋅ .75 = 15 (boys wearing green shirts)
23 - 15 = 8
To find the number of boys wearing green shirts you need to divide the percentage (75%) by 100 to get a decimal (.75). Multiplying the decimal by the number of boys in class gives you the number of boys wearing green shirts. Then all that's left is to subtract.