That's what I originally thought but when the math is applied it doesn't add up
Base + rank % =max rank x mod % (275+15) = total
Ivara P. 200+50%=300x290%=870 close to her max 880
Garuda P. 160+125%=360x290%=1,044 not even close to the 824
and other frames line up with Ivara Primes math.