75%
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LCM for 90 and 120 is 360.
(120 + 60) ÷ 2 = 90
The percentage reduction = (120 - 90) x 100 / 120 = 30 x 100/120 = 25%
90 /120 x 100 = 75%This means that 90 is 755 of 120, so...100% - 75% = 25% change
Least Common Multiple (LCM) for 120 90 is 360.