Number of frames destroyed = (data rate of given ethernet * noice) / average frame size
data rate of,
gigabit ethernet LAN = $1Gbps =$ $10^{9} bps$
Fast Ethernet LAN = $100Mbps$
standard Ethernet LAN = $10Mbps$
so Number of frames destroyed in Gigabit Ethernet LAN = $10^{9} * 2 * 10^{-3} / 8000 = 250$
for other ethernets also you can just change the data rates only.
Note: since the data rate is in bits/sec, we need to convert others in seconds or bits only.