Follow these rules:
Multiply and divide before adding and subtracting.
(1/4)(1/4) = 1/16, so now we have 1/16 - 1/4 ÷ 1/4 ÷ 1/4 ÷ 1/4
1/4 ÷ 1/4 = 1, so now we have 1/16 - 1 ÷ 1/4 ÷ 1/4
1 ÷ 1/4 = 4, so now we have 1/16 - 4 ÷ 1/4
4 ÷ 1/4 = 16, so now we have 1/16 - 16
1 - 256
and this simplifies to -15 15/16, or ------------
16
