Answer:
60% decrease
Step-by-step explanation:
To find the percentage increase/ decrease construct a fraction with numerator showing increase/ decrease and denominator with original number then multiply the fraction by 100%
here the decrease = 45 - 18 = 27
percent decrease = [tex]\frac{decrease}{original}[/tex] × 100%
= [tex]\frac{27}{45}[/tex] × 100% = 60%