1000 - 775 = 225-775 + 1000 = 225
first way is easy: 1000 minus 775 second way (might be the second way but not sure): minus 775 from 100 plus 225
The GCF is 25.
First you calculate 1.8 percent of 775 = 13.95 now subtract 13.95 from 775 = 761.05
755000
-755
31/40
475
If this is a riddle, the answer is "only once, because after that you have only 879 to subtract from". Otherwise, you can subtract 8 lots of 121 from 1000.
800
77.5% = 775/1000 which can be simplified, if required.
875