Malaysia tax:
On the first 2,500 0% 0
On the next 2,500 1% 25
On the first 5,000 - 25
On the next 5,000 3% 150
On the first 10,000 - 175
On the next 15,000 3% 300
On the first 20,000 - 475
On the next 15,000 7% 1,050
On the first 35,000 - 1,525
On the next 15,000 13% 1,950
On the first 50,000 - 3,475
On the next 20,000 19% 3,800
On the first 70,000 - 7,275
On the next 30,000 24% 7,200
On the first 100,000 - 14,475
On the next 50,000 27% 13,500
On the first 150,000 - 27,975
On the next 100,000 27% 27,000
On the first 250,000 - 54,975
Exceeding 250,000 28% -
Singapore tax:

For the first S$20,000 0%
S$20,000 - S$30,000 3.5%
S$30,000 - S$40,000 5.5%
S$40,000 - S$80,000 8.5%
S$80,000 - S$160,000 14%
S$160,000 - S$320,000 17%
S$320,000 and above 20%
Majority ppl fall into 40000 - 90000 range. For example,

40000, SG is 8.5%, MY is ~5.43%
50000, SG is 8.5%, MY is 6.95%
55000, SG is 8.5%, MY is ~8%
60000, SG is 8.5%, MY is ~9%
80000, SG is 8.5%, MY is ~12%
100000, SG is 14%, MY is 14.475%