0
Anonymous
400
Let x = the number
10% of x = 40
0.10 x = 40
0.10x/0.10 = 40/0.10
x = 400
check:
10% of 400 = 40
0.10 * 400 = 40
40=40
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10
40% = 0.4 = 40/100
The number 50 equals 40 percent of the number 125.
40% of 105 = 42
50