The predeccessor of a number is the number obtained by substracting one from the given number, also known as the before number.

For example – predecessor of 9 will be 8 (9-1 = 8)

(a) 94 – 1 = 93

(b) 10000 – 1 = 9999

(c) 208090 – 1 = 208089

(d) 7654321 – 1 = 7654320