Modifying the Bond and Tinker Formula for Use with Low IQ

IQ of a person is given by the formula $IQ = dfrac{{MA}}{{CA}} times 100$ where MA is mental age and CA is chronological age If $80 leqslant IQ

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iq calculation formula Its been a while since I have used CapIQ and the guides are not helpful I am trying to match the multiples on a report from an IB to see

iqra hasan biography in hindi IQ of a person is given by formula: IQ ltmath gt ltmrow gt ltmo gt= ltmo gt ltmfrac gt ltm