Question 1157147
This is ready made to be put into a calculator.
(-.14, +.25) is the 98% CI.

By hand, the half-interval or z*SE  is z(0.99)*sqrt (p1(1-p1)/n1)+(p2(1-p2)/n2))
=2.33*sqrt(0.00706)
and to rounding error, you get a half-interval of 0.195, which is half the difference between -.14 and +.25 above.