4 ms·30% loss from 100 is 70. 30% of 70 is 21. So a 30% gain at 70 gets you to 91. 1/.7 = 1.429by acchow 7y ago30% loss from 100 is 70. 30% of 70 is 21. So a 30% gain at 70 gets you to 91. 1/.7 = 1.429