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It's almost certainly a filtering capacitor (to attenuate and reduce power supply ripple) and because big electrolytic capacitors have really poor tolerances (some as bad as +-80%!!!!) you'd be fine.
Depending on what you are doing fine to messed up.
DC power supply: it will work fine. Less ripple.
Filter: it will change the band pass or wave shape.
Oscillator: it can change the frequency or wave shape.
The voltage is the same = Good and necessary.
The extra 50 uF capacitance is also = Good and improved for a filter capacitor.
If u want to read it Yes you can.
However if this capacitor is part of a RC timing circuit it will run slower and that means the time will run longer by the ratio of 27/20 = 1.35...
Couldn't say it any better, so I won't ;)
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Posted:Feb 16, 2017
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