Perhaps when this was made, you could do that with whatever version of HPT was out. Likely 2.22 or 2.23.
Now with 2.24 and the beta 2.25, just doing .98 is the only way to reduce the number.
I dont think so. If you multiply a positive number with a negative number, you will get a negative number. Regardless of the HPT version number. The proper way is the multiply by less than 1 to reduce and more than 1 to add.
1999 Buick Riviera - L67
PLX wideband +HPT pro +X-P HOT cam, 140#springs, 2x chain, LS7 lifted
ZZP SS Headers + 3" Downpipe + 200 Cell Cat.+ Aero Resonator
Gen V swapped L67, 60# injectors, E85, N*&LQ4MAF