The number is 1.
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Nothing.. Because 21 is a Prime number
There is no number that goes into both. must be a trick questionthis is another person not the same one :)the number that goes into 12 and 21 is 3 which is a 5th grade problemwho ever said theres no number that goes into 12 and 21 is WRONG!
341 ÷ 40 = 8 21/40 = 8.525
The HCF of 38 and 40 is 2
40% of 52.5 40/100=0.4 0.4x52.5=21