Answer:
28800
Explanation:
first find Gerard's salary and then divide it by 1.25
Let M be Martin and G be Gerard
Let 12:7 be 12x:7x
21000 = 7x
x = 3000
12x = 3000*12 = G after pay rise
12x = 36000 = G after pay rise
36000 = 125% G before pay rise
1.25G = 36000
G = 28800
Hope this helps ;)
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