Charlie is tracking the relative humidity near his house using a hygrometer. on monday morning, the percent relative humidity, according to the hygrometer, was 82.7. he used his hygrometer several times that week and made the following notes.
by the end of the day monday, the reading on the hygrometer decreased by 11.2.
tuesday morning, the reading on the hygrometer had decreased by 6.5 more.
on wednesday morning, the reading on the hygrometer increased by 5.
thursday morning, the hydrometer showed a percent relative humidity that was half of the reading from the day before.
friday afternoon, the reading on the hygrometer increased by of the reading from thursday morning.
based on his notes, what percent relative humidity did charlie's hygrometer indicate on friday afternoon?