Isaac knows that ¼ is written as 0.25 in decimal form. How can he find a decimal for 7/5?

To find a decimal for 7/5, Isaac can divide 7 by 5 using long division:

1.00 (quotient)
________________
5 | 7.00 (dividend)
- 5
________
2.00
- 0
________
20
- 20
_________
0

The remainder is 0, so the decimal form of 7/5 is 1.40.