The least common multiple (LCM) of two numbers is the smallest number (not zero) that is a multiple of both.
Multiples of 70 are
0,70,140,210,280,350.......
Multiples of 280 are
0,280,560,840......
So the LCM of 70 and 280 is nothing but 280
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To find 25 percent of 280, you simply multiply 280 by 0.25 (which is the decimal form of 25 percent). So, 280 x 0.25 = 70. Therefore, 25 percent of 280 is 70.
The LCM of the given three numbers is: 5460
70
280
The LCM is: 1,400