Rampage's drop of 41% from it's first week was better than many thought, it's US take is at $66.6 million, with it's international total at $216.4 million, for a total of $283 million. While this is positive news for Rampage it's not such good news for Pacific Rim: Uprising, the other recently released monster film.
Rampage has already overtaken PRU even though it open two weeks after it. In the US Rampage is ahead by $8 million, and even though PRU has a $7 million advantage internationally Rampage is ahead by $1 million overall. What also does't help PRU is they had a home field advantage, so to speak, with China (the owners of Legendary Pictures are based there) and after a strong start the box office there has collapsed for the film and it looks like if will fall far short of the first film despite that stronger start.
Critics ratings of the two films weren't far apart but fan ratings were much better for Rampage, which probably has help Rampage to stay strong at the box office (82% for Rampage vs. 47% for PRU via RT).
Other issue is profit, PRU budget was $150 million while Rampage was only $120 million, even if they finished around the same total take Rampage would have the better bottom line. Legendary/Universal did more promoting of PRU too (via social media, and more merchandise tie-ins) but those didn't seem to help. The possible sequel looks very unlikely at this point for PRU.
Update 4/24: Actuals have come in and PRU has edged up a little worldwide, slightly ahead of Rampage. Most of the rest posted stayed the same.