Question 527939
{{{ ((1.5*3) + 7.2) / 12 = (4.5 + 7.2) / 12 = (11.7/12) = .975 }}}
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or
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{{{ ((1.5*3) + 7.2) / 12 = (3*1.5 + 3*2.4) /12 = 3*(1.5+2.4)/12 = (1.5+2.4)/4 = 3.9/4 = .975 }}}
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Done.