Average = (9 + 31)/2 = 40/2 = 20
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Their average is 22 and their difference is 9 so use 22 and 9 13*31 = 222 - 92 = 484 - 81 = 403
Lcm of 9 and 31 is 279.
31 is 100 pecent. 31/100 = 0.31 is 1 percent 31/9 = 29.03 9 is 29.03 percent out of 31
31/9 = 34/9
31