Card 1 : $1000 at apr 15% monthly payment $100
Card 2 : $1000 at apr 10% monthly payment $100
and after consolidation(without reduction) things will be different
$1000 at APR less than 10% monthly payment $200 and you will see that you have saved a good amount. (I need prof Calculas to show the exact figures, where are you professor

)
Pay off the debt with higher APR first, it will save a lot of interest rates. Pay the minimum to the other account. (Prof Calculas taught me this

)
Tintin