we cant do 6-8 so we borrow from the place to the right which turns the 7 into a 6 and the 6 into a 16. 16 minus 8 is 8. Next 6-8 again (The seven is no more.) We already know we cant do dat soooo we borrow from the tenths place. The 1 is now a 0 and the 6 is now a 16. 16 minus 8 is 8. Next is 0-6 (No more 1 because we borrowed from the tenths place.) we cant do 0-6 so we have to borrow from the ones place. Make the 6 a 5 and make the 0 a ten. 10-6 is 4. So far we got 488 but make sure to add a decimal point in front of it. Always bring down the decimal point. so its now (.488) lastly 5- 2 is 3 so the answer is 3.488