Is this a math question or not?
If the FOREX was 47:1 then and now 43.5:1 has the USD lost value or has the PhP gained value or both? Does inflation play a role and/or is it supply and demand issue?
The PhP is the larger of the two in both cases. It is the approximate rate early in 2009 to the present time. It looks to me that my dollar will not buy as much now as before. For a $2000 + monthly income, it took a big hit.

Sounds more like an economics question. And if those are supposed to be forex pair ratios, you did not state whether it was USD/PhP (whatever that is) or PhP/USD…
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LikeDislikeIn my humble opinion, Mathematics is pure science. Foreign exchange does not seem to be pure science. For me, it is a muddle that only pigs would like to wallow in. Or, currency raiders. Or, multi-national corporate financiers who would let us all inherit the wind.
Therefore, my answer must be in the negative.
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