Express each of the following decimals in the form pq :
(i) 0.¯¯¯4 (ii) 0.¯¯¯¯¯¯37
(iii) 0.¯¯¯¯¯¯54 (iv) 0.¯¯¯¯¯¯¯¯621
(v) 125.¯¯¯3 (vi) 4.¯¯¯7
(vii) 0.4¯¯¯7