341 Lightning’s were built (4 of which static test airframes which never flew). Hence 337 Lightning airframes flew including P.1A/B prototypes and P.1B/F Mk 1 pre-production airframes.
76 RAF Lightning’s crashed or SOC after flying/taxing accidents, ground fires and one from mercury contamination. Another 18 lost by other airforces (Kuwait and Saudi), plus another 4 lost from the pre-production batch.
Gives a total figure of 98
(98/337)x100= 29.08%