Question 1067552
the multiplicative inverse of a number is in other words, the reciprocal of the number. (the reciprocal of 2 is 1/2; the reciprocal of 1/9 is 9, etc.)

for this problem, first you have to solve the expression.

(-7)^-2 is the same as 1/(-7)^2, which is 1/49
(90)^-1 is the same as 1/(90)^1, which is 1/90

1/49 divided by 1/90 is the same as 1/49 multiplied by 90, so 
the answer is 90/49.