The Singapore Assault Rifle 21 (SAR 21) developed locally will be standard issue for Singapore soldiers in the 21st century, replacing the M-16. The SAR 21 boasts many advanced features, one of which is a laser aiming device. The overall length of the SAR 21 is 80.5 cm while the M-16 has an overall length of 99 cm. The mass of SAR 21 is 3.98 kg while the M- 16 has a mass of 4.06 kg. Calculate:
a) the difference in the overall length of the SAR 21 as compared to the M-16, as a percentage of SAR 21's length, and,
b) the difference in the mass of he M-16 as compared with the SAR 21, as a percentage of M-16's mass.
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