Subtract the following fractions. explain what he did wrong? 7/12 - 7/4 = 7/8

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

The equation respenting the left table is