What is 4/5 as a percent

What is 7/8 as a percent

Ineed me i stuck and i don’t want to get it wrong

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Which graph of a hyperbola represents the equation 16x^2-y^2=16