Area of a triangle = ½ * base * height
Area of blue triangle = ½ * 4 * 4
Area of blue triangle = 8
Area of red triangle = ½ * 4 * 3
Area of red triangle = 6
TOTAL AREA = 8 + 6 = 14
Answer: Decrease = 50%
Step-by-step explanation:
105 - 63|/105 = 42/105 = 0.4 = 40%