a chemist has 400 mililiters (mL) of solution that is 21% acid. How many mililiers of acid are in the solution
400 X .21= ML OF SOLUTION
WHEN WORKING WITH % YOU PUT A DECIMAL IN FRONT OF THE NUMBER
MULTIPLY THE # BY .01 AND YOU GET THE %
EXAMPLE
21%= 21*.01= .21
8%= 8*.01=.08
100%=100*.01= 1.0
HOPE THAT HELPS